diff --git a/commonjs/core.js b/commonjs/core.js
index 16ee5bb..921d54f 100644
--- a/commonjs/core.js
+++ b/commonjs/core.js
@@ -1,4 +1,5 @@
 Object.defineProperty(exports, "__esModule", { value: true });
+exports._areEquals = exports.validate = exports.validator = exports.applyReducer = exports.applyPatch = exports.applyOperation = exports.getValueByPointer = exports.deepClone = exports.JsonPatchError = void 0;
 var helpers_js_1 = require("./helpers.js");
 exports.JsonPatchError = helpers_js_1.PatchError;
 exports.deepClone = helpers_js_1._deepClone;
@@ -30,7 +31,7 @@ var objOps = {
         and is potentially unneeded */
         var removed = getValueByPointer(document, this.path);
         if (removed) {
-            removed = helpers_js_1._deepClone(removed);
+            removed = (0, helpers_js_1._deepClone)(removed);
         }
         var originalValue = applyOperation(document, { op: "remove", path: this.from }).removed;
         applyOperation(document, { op: "add", path: this.path, value: originalValue });
@@ -39,7 +40,7 @@ var objOps = {
     copy: function (obj, key, document) {
         var valueToCopy = getValueByPointer(document, this.from);
         // enforce copy by value so further operations don't affect source (see issue #177)
-        applyOperation(document, { op: "add", path: this.path, value: helpers_js_1._deepClone(valueToCopy) });
+        applyOperation(document, { op: "add", path: this.path, value: (0, helpers_js_1._deepClone)(valueToCopy) });
         return { newDocument: document };
     },
     test: function (obj, key, document) {
@@ -53,7 +54,7 @@ var objOps = {
 /* The operations applicable to an array. Many are the same as for the object */
 var arrOps = {
     add: function (arr, i, document) {
-        if (helpers_js_1.isInteger(i)) {
+        if ((0, helpers_js_1.isInteger)(i)) {
             arr.splice(i, 0, this.value);
         }
         else { // array props
@@ -167,7 +168,7 @@ function applyOperation(document, operation, validateOperation, mutateDocument,
     } /* END ROOT OPERATIONS */
     else {
         if (!mutateDocument) {
-            document = helpers_js_1._deepClone(document);
+            document = (0, helpers_js_1._deepClone)(document);
         }
         var path = operation.path || "";
         var keys = path.split('/');
@@ -186,7 +187,7 @@ function applyOperation(document, operation, validateOperation, mutateDocument,
         while (true) {
             key = keys[t];
             if (key && key.indexOf('~') != -1) {
-                key = helpers_js_1.unescapePathComponent(key);
+                key = (0, helpers_js_1.unescapePathComponent)(key);
             }
             if (banPrototypeModifications &&
                 (key == '__proto__' ||
@@ -212,10 +213,10 @@ function applyOperation(document, operation, validateOperation, mutateDocument,
                     key = obj.length;
                 }
                 else {
-                    if (validateOperation && !helpers_js_1.isInteger(key)) {
+                    if (validateOperation && !(0, helpers_js_1.isInteger)(key)) {
                         throw new exports.JsonPatchError("Expected an unsigned base-10 integer value, making the new referenced value the array element with the zero-based index", "OPERATION_PATH_ILLEGAL_ARRAY_INDEX", index, operation, document);
                     } // only parse key when it's an integer for `arr.prop` to work
-                    else if (helpers_js_1.isInteger(key)) {
+                    else if ((0, helpers_js_1.isInteger)(key)) {
                         key = ~~key;
                     }
                 }
@@ -272,7 +273,7 @@ function applyPatch(document, patch, validateOperation, mutateDocument, banProto
         }
     }
     if (!mutateDocument) {
-        document = helpers_js_1._deepClone(document);
+        document = (0, helpers_js_1._deepClone)(document);
     }
     var results = new Array(patch.length);
     for (var i = 0, length_1 = patch.length; i < length_1; i++) {
@@ -328,7 +329,7 @@ function validator(operation, index, document, existingPathFragment) {
     else if ((operation.op === 'add' || operation.op === 'replace' || operation.op === 'test') && operation.value === undefined) {
         throw new exports.JsonPatchError('Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)', 'OPERATION_VALUE_REQUIRED', index, operation, document);
     }
-    else if ((operation.op === 'add' || operation.op === 'replace' || operation.op === 'test') && helpers_js_1.hasUndefined(operation.value)) {
+    else if ((operation.op === 'add' || operation.op === 'replace' || operation.op === 'test') && (0, helpers_js_1.hasUndefined)(operation.value)) {
         throw new exports.JsonPatchError('Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)', 'OPERATION_VALUE_CANNOT_CONTAIN_UNDEFINED', index, operation, document);
     }
     else if (document) {
@@ -368,7 +369,7 @@ function validate(sequence, document, externalValidator) {
         }
         if (document) {
             //clone document and sequence so that we can safely try applying operations
-            applyPatch(helpers_js_1._deepClone(document), helpers_js_1._deepClone(sequence), externalValidator || true);
+            applyPatch((0, helpers_js_1._deepClone)(document), (0, helpers_js_1._deepClone)(sequence), externalValidator || true);
         }
         else {
             externalValidator = externalValidator || validator;
diff --git a/commonjs/duplex.js b/commonjs/duplex.js
index 88975c6..d2d0ebf 100644
--- a/commonjs/duplex.js
+++ b/commonjs/duplex.js
@@ -1,4 +1,5 @@
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.compare = exports.generate = exports.observe = exports.unobserve = void 0;
 /*!
  * https://github.com/Starcounter-Jack/JSON-Patch
  * (c) 2017-2021 Joachim Wester
@@ -56,7 +57,7 @@ function observe(obj, callback) {
         return observer;
     }
     observer = {};
-    mirror.value = helpers_js_1._deepClone(obj);
+    mirror.value = (0, helpers_js_1._deepClone)(obj);
     if (callback) {
         observer.callback = callback;
         observer.next = null;
@@ -101,7 +102,7 @@ function generate(observer, invertible) {
     var mirror = beforeDict.get(observer.object);
     _generate(mirror.value, observer.object, observer.patches, "", invertible);
     if (observer.patches.length) {
-        core_js_1.applyPatch(mirror.value, observer.patches);
+        (0, core_js_1.applyPatch)(mirror.value, observer.patches);
     }
     var temp = observer.patches;
     if (temp.length > 0) {
@@ -121,34 +122,34 @@ function _generate(mirror, obj, patches, path, invertible) {
     if (typeof obj.toJSON === "function") {
         obj = obj.toJSON();
     }
-    var newKeys = helpers_js_1._objectKeys(obj);
-    var oldKeys = helpers_js_1._objectKeys(mirror);
+    var newKeys = (0, helpers_js_1._objectKeys)(obj);
+    var oldKeys = (0, helpers_js_1._objectKeys)(mirror);
     var changed = false;
     var deleted = false;
     //if ever "move" operation is implemented here, make sure this test runs OK: "should not generate the same patch twice (move)"
     for (var t = oldKeys.length - 1; t >= 0; t--) {
         var key = oldKeys[t];
         var oldVal = mirror[key];
-        if (helpers_js_1.hasOwnProperty(obj, key) && !(obj[key] === undefined && oldVal !== undefined && Array.isArray(obj) === false)) {
+        if ((0, helpers_js_1.hasOwnProperty)(obj, key) && !(obj[key] === undefined && oldVal !== undefined && Array.isArray(obj) === false)) {
             var newVal = obj[key];
             if (typeof oldVal == "object" && oldVal != null && typeof newVal == "object" && newVal != null && Array.isArray(oldVal) === Array.isArray(newVal)) {
-                _generate(oldVal, newVal, patches, path + "/" + helpers_js_1.escapePathComponent(key), invertible);
+                _generate(oldVal, newVal, patches, path + "/" + (0, helpers_js_1.escapePathComponent)(key), invertible);
             }
             else {
                 if (oldVal !== newVal) {
                     changed = true;
                     if (invertible) {
-                        patches.push({ op: "test", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(oldVal) });
+                        patches.push({ op: "test", path: path + "/" + (0, helpers_js_1.escapePathComponent)(key), value: (0, helpers_js_1._deepClone)(oldVal) });
                     }
-                    patches.push({ op: "replace", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(newVal) });
+                    patches.push({ op: "replace", path: path + "/" + (0, helpers_js_1.escapePathComponent)(key), value: (0, helpers_js_1._deepClone)(newVal) });
                 }
             }
         }
         else if (Array.isArray(mirror) === Array.isArray(obj)) {
             if (invertible) {
-                patches.push({ op: "test", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(oldVal) });
+                patches.push({ op: "test", path: path + "/" + (0, helpers_js_1.escapePathComponent)(key), value: (0, helpers_js_1._deepClone)(oldVal) });
             }
-            patches.push({ op: "remove", path: path + "/" + helpers_js_1.escapePathComponent(key) });
+            patches.push({ op: "remove", path: path + "/" + (0, helpers_js_1.escapePathComponent)(key) });
             deleted = true; // property has been deleted
         }
         else {
@@ -164,8 +165,8 @@ function _generate(mirror, obj, patches, path, invertible) {
     }
     for (var t = 0; t < newKeys.length; t++) {
         var key = newKeys[t];
-        if (!helpers_js_1.hasOwnProperty(mirror, key) && obj[key] !== undefined) {
-            patches.push({ op: "add", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(obj[key]) });
+        if (!(0, helpers_js_1.hasOwnProperty)(mirror, key) && obj[key] !== undefined) {
+            patches.push({ op: "add", path: path + "/" + (0, helpers_js_1.escapePathComponent)(key), value: (0, helpers_js_1._deepClone)(obj[key]) });
         }
     }
 }
diff --git a/commonjs/helpers.js b/commonjs/helpers.js
index 5f2350e..db0c6f5 100644
--- a/commonjs/helpers.js
+++ b/commonjs/helpers.js
@@ -7,16 +7,19 @@ var __extends = (this && this.__extends) || (function () {
     var extendStatics = function (d, b) {
         extendStatics = Object.setPrototypeOf ||
             ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
-            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
         return extendStatics(d, b);
     };
     return function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
         extendStatics(d, b);
         function __() { this.constructor = d; }
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.PatchError = exports.hasUndefined = exports.getPath = exports._getPathRecursive = exports.unescapePathComponent = exports.escapePathComponent = exports.isInteger = exports._deepClone = exports._objectKeys = exports.hasOwnProperty = void 0;
 var _hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwnProperty(obj, key) {
     return _hasOwnProperty.call(obj, key);
@@ -122,7 +125,7 @@ function getPath(root, obj) {
     if (path === '') {
         throw new Error("Object not found in root");
     }
-    return "/" + path;
+    return "/".concat(path);
 }
 exports.getPath = getPath;
 /**
@@ -158,7 +161,7 @@ function patchErrorMessageFormatter(message, args) {
     for (var key in args) {
         var value = typeof args[key] === 'object' ? JSON.stringify(args[key], null, 2) : args[key]; // pretty print
         if (typeof value !== 'undefined') {
-            messageParts.push(key + ": " + value);
+            messageParts.push("".concat(key, ": ").concat(value));
         }
     }
     return messageParts.join('\n');
diff --git a/module/helpers.mjs b/module/helpers.mjs
index 592f560..a090f68 100644
--- a/module/helpers.mjs
+++ b/module/helpers.mjs
@@ -7,10 +7,12 @@ var __extends = (this && this.__extends) || (function () {
     var extendStatics = function (d, b) {
         extendStatics = Object.setPrototypeOf ||
             ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
-            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
         return extendStatics(d, b);
     };
     return function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
         extendStatics(d, b);
         function __() { this.constructor = d; }
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
@@ -114,7 +116,7 @@ export function getPath(root, obj) {
     if (path === '') {
         throw new Error("Object not found in root");
     }
-    return "/" + path;
+    return "/".concat(path);
 }
 /**
 * Recursively checks whether an object has any undefined values inside.
@@ -148,7 +150,7 @@ function patchErrorMessageFormatter(message, args) {
     for (var key in args) {
         var value = typeof args[key] === 'object' ? JSON.stringify(args[key], null, 2) : args[key]; // pretty print
         if (typeof value !== 'undefined') {
-            messageParts.push(key + ": " + value);
+            messageParts.push("".concat(key, ": ").concat(value));
         }
     }
     return messageParts.join('\n');
diff --git a/package-lock.json b/package-lock.json
index b7ef169..179ef01 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "fast-json-patch",
-  "version": "3.1.0",
+  "version": "3.2.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "fast-json-patch",
-      "version": "3.1.0",
+      "version": "3.2.0",
       "license": "MIT",
       "devDependencies": {
         "benchmark": "^2.1.4",
@@ -282,9 +282,9 @@
       "dev": true
     },
     "node_modules/ansi-regex": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
-      "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.1.tgz",
+      "integrity": "sha512-ILlv4k/3f6vfQ4OoP2AGvirOktlQ98ZEL1k9FaQjxa3L1abBgbuTDAdPOpvbGncC0BTVQrl+OM8xZGK6tWXt7g==",
       "dev": true,
       "engines": {
         "node": ">=6"
@@ -882,6 +882,30 @@
         "upper-case-first": "^1.1.0"
       }
     },
+    "node_modules/chokidar": {
+      "version": "2.1.8",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.1.8.tgz",
+      "integrity": "sha512-ZmZUazfOzf0Nve7duiCKD23PFSCs4JPoYyccjUFF3aQkQadqBhfzhjkwBH2mNOG9cTBwhamM37EIsIkZw3nRgg==",
+      "deprecated": "Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependencies",
+      "dev": true,
+      "optional": true,
+      "dependencies": {
+        "anymatch": "^2.0.0",
+        "async-each": "^1.0.1",
+        "braces": "^2.3.2",
+        "glob-parent": "^3.1.0",
+        "inherits": "^2.0.3",
+        "is-binary-path": "^1.0.0",
+        "is-glob": "^4.0.0",
+        "normalize-path": "^3.0.0",
+        "path-is-absolute": "^1.0.0",
+        "readdirp": "^2.2.1",
+        "upath": "^1.1.1"
+      },
+      "optionalDependencies": {
+        "fsevents": "^1.2.7"
+      }
+    },
     "node_modules/chownr": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.2.tgz",
@@ -1399,12 +1423,12 @@
       "dev": true
     },
     "node_modules/emojis-list": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/emojis-list/-/emojis-list-2.1.0.tgz",
-      "integrity": "sha1-TapNnbAPmBmIDHn6RXrlsJof04k=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/emojis-list/-/emojis-list-3.0.0.tgz",
+      "integrity": "sha512-/kyM18EfinwXZbno9FyUGeFh87KC8HRQBQGildHZbEuRyWFOmv1U10o9BBp8XVZDVNNuQKyIGIu5ZYAAXJ0V2Q==",
       "dev": true,
       "engines": {
-        "node": ">= 0.10"
+        "node": ">= 4"
       }
     },
     "node_modules/end-of-stream": {
@@ -1417,19 +1441,32 @@
       }
     },
     "node_modules/enhanced-resolve": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-4.1.0.tgz",
-      "integrity": "sha512-F/7vkyTtyc/llOIn8oWclcB25KdRaiPBpZYDgJHgh/UHtpgT2p2eldQgtQnLtUvfMKPKxbRaQM/hHkvLHt1Vng==",
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-4.5.0.tgz",
+      "integrity": "sha512-Nv9m36S/vxpsI+Hc4/ZGRs0n9mXqSWGGq49zxb/cJfPAQMbUtttJAlNPS4AQzaBdw/pKskw5bMbekT/Y7W/Wlg==",
       "dev": true,
       "dependencies": {
         "graceful-fs": "^4.1.2",
-        "memory-fs": "^0.4.0",
+        "memory-fs": "^0.5.0",
         "tapable": "^1.0.0"
       },
       "engines": {
         "node": ">=6.9.0"
       }
     },
+    "node_modules/enhanced-resolve/node_modules/memory-fs": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/memory-fs/-/memory-fs-0.5.0.tgz",
+      "integrity": "sha512-jA0rdU5KoQMC0e6ppoNRtpp6vjFq6+NY7r8hywnC7V+1Xj/MtHwGIbB1QaK/dunyjWteJzmkpd7ooeWg10T7GA==",
+      "dev": true,
+      "dependencies": {
+        "errno": "^0.1.3",
+        "readable-stream": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=4.3.0 <5.0.0 || >=5.10"
+      }
+    },
     "node_modules/errno": {
       "version": "0.1.7",
       "resolved": "https://registry.npmjs.org/errno/-/errno-0.1.7.tgz",
@@ -1534,24 +1571,6 @@
         "safe-buffer": "^5.1.1"
       }
     },
-    "node_modules/execa": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/execa/-/execa-1.0.0.tgz",
-      "integrity": "sha512-adbxcyWV46qiHyvSp50TKt05tB4tK3HcmF7/nxfAdhnox83seTDbwnaqKO4sXRy7roHAIFqJP/Rw/AuEbX61LA==",
-      "dev": true,
-      "dependencies": {
-        "cross-spawn": "^6.0.0",
-        "get-stream": "^4.0.0",
-        "is-stream": "^1.1.0",
-        "npm-run-path": "^2.0.0",
-        "p-finally": "^1.0.0",
-        "signal-exit": "^3.0.0",
-        "strip-eof": "^1.0.0"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -2640,18 +2659,6 @@
         "node": "6.* || 8.* || >= 10.*"
       }
     },
-    "node_modules/get-stream": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-4.1.0.tgz",
-      "integrity": "sha512-GMat4EJ5161kIy2HevLlr4luNjBgvmj413KaQA7jt4V8B4RDsfpHk7WQ9GVqfYyyx8OS/L66Kox+rJRNklLK7w==",
-      "dev": true,
-      "dependencies": {
-        "pump": "^3.0.0"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/get-value": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/get-value/-/get-value-2.0.6.tgz",
@@ -3039,23 +3046,14 @@
       "dev": true
     },
     "node_modules/interpret": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/interpret/-/interpret-1.2.0.tgz",
-      "integrity": "sha512-mT34yGKMNceBQUoVn7iCDKDntA7SC6gycMAWzGx1z/CMCTV7b2AAtXlo3nRyHZ1FelRkQbQjprHSYGwzLtkVbw==",
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/interpret/-/interpret-1.4.0.tgz",
+      "integrity": "sha512-agE4QfB2Lkp9uICn7BAqoscw4SZP9kTE2hxiFI3jBPmXJfdqiahTbUuKGsMoN2GtqL9AxhYioAcVvgsb1HvRbA==",
       "dev": true,
       "engines": {
         "node": ">= 0.10"
       }
     },
-    "node_modules/invert-kv": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/invert-kv/-/invert-kv-2.0.0.tgz",
-      "integrity": "sha512-wPVv/y/QQ/Uiirj/vh3oP+1Ww+AWehmi1g5fFWGPF6IpCBCDVrhgHRMvrLfdYcwDh3QJbGXDW4JAuzxElLSqKA==",
-      "dev": true,
-      "engines": {
-        "node": ">=4"
-      }
-    },
     "node_modules/is-accessor-descriptor": {
       "version": "0.1.6",
       "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz",
@@ -3230,15 +3228,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/is-stream": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
-      "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/is-typedarray": {
       "version": "1.0.0",
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+      "integrity": "sha512-NVWBaz9k839ZH/sinurM+HcDvJOTXwSjYp1ku+5XKeOC03z8v5QitnK/x+lAxGXFyhdayoIf/GOpv85z3/xPag==",
       "dev": true,
       "requires": {
-        "chalk": "2.4.2",
-        "cross-spawn": "6.0.5",
-        "enhanced-resolve": "4.1.0",
-        "findup-sync": "3.0.0",
-        "global-modules": "2.0.0",
-        "import-local": "2.0.0",
-        "interpret": "1.2.0",
-        "loader-utils": "1.2.3",
-        "supports-color": "6.1.0",
-        "v8-compile-cache": "2.0.3",
-        "yargs": "13.2.4"
+        "chalk": "^2.4.2",
+        "cross-spawn": "^6.0.5",
+        "enhanced-resolve": "^4.1.1",
+        "findup-sync": "^3.0.0",
+        "global-modules": "^2.0.0",
+        "import-local": "^2.0.0",
+        "interpret": "^1.4.0",
+        "loader-utils": "^1.4.0",
+        "supports-color": "^6.1.0",
+        "v8-compile-cache": "^2.1.1",
+        "yargs": "^13.3.2"
       },
       "dependencies": {
         "supports-color": {
@@ -11069,25 +10792,6 @@
           "requires": {
             "has-flag": "^3.0.0"
           }
-        },
-        "yargs": {
-          "version": "13.2.4",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.2.4.tgz",
-          "integrity": "sha512-HG/DWAJa1PAnHT9JAhNa8AbAv3FPaiLzioSjCcmuXXhP8MlpHO5vwls4g4j6n30Z74GVQj8Xa62dWVx1QCGklg==",
-          "dev": true,
-          "requires": {
-            "cliui": "^5.0.0",
-            "find-up": "^3.0.0",
-            "get-caller-file": "^2.0.1",
-            "os-locale": "^3.1.0",
-            "require-directory": "^2.1.1",
-            "require-main-filename": "^2.0.0",
-            "set-blocking": "^2.0.0",
-            "string-width": "^3.0.0",
-            "which-module": "^2.0.0",
-            "y18n": "^4.0.0",
-            "yargs-parser": "^13.1.0"
-          }
         }
       }
     },
@@ -11185,9 +10889,9 @@
       "dev": true
     },
     "yargs": {
-      "version": "13.3.0",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.0.tgz",
-      "integrity": "sha512-2eehun/8ALW8TLoIl7MVaRUrg+yCnenu8B4kBlRxj3GJGDKU1Og7sMXPNm1BYyM1DOJmTZ4YeN/Nwxv+8XJsUA==",
+      "version": "13.3.2",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.2.tgz",
+      "integrity": "sha512-AX3Zw5iPruN5ie6xGRIDgqkT+ZhnRlZMLMHAs8tg7nRruy2Nb+i5o9bwghAogtM08q1dpr2LVoS8KSTMYpWXUw==",
       "dev": true,
       "requires": {
         "cliui": "^5.0.0",
@@ -11199,7 +10903,7 @@
         "string-width": "^3.0.0",
         "which-module": "^2.0.0",
         "y18n": "^4.0.0",
-        "yargs-parser": "^13.1.1"
+        "yargs-parser": "^13.1.2"
       }
     },
     "yargs-parser": {
diff --git a/package.json b/package.json
index fa1c678..138c88b 100644
--- a/package.json
+++ b/package.json
@@ -1,65 +1,65 @@
 {
-  "name": "fast-json-patch",
-  "version": "3.1.1",
-  "description": "Fast implementation of JSON-Patch (RFC-6902) with duplex (observe changes) capabilities",
-  "homepage": "https://github.com/Starcounter-Jack/JSON-Patch",
-  "keywords": [
-    "json",
-    "patch",
-    "http",
-    "rest"
-  ],
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/Starcounter-Jack/JSON-Patch.git"
-  },
-  "bugs": {
-    "url": "https://github.com/Starcounter-Jack/JSON-Patch/issues"
-  },
-  "author": {
-    "name": "Joachim Wester",
-    "email": "joachimwester@me.com",
-    "url": "http://www.starcounter.com/"
-  },
-  "license": "MIT",
-  "main": "index.js",
-  "module": "index.mjs",
-  "typings": "index.d.ts",
-  "devDependencies": {
-    "benchmark": "^2.1.4",
-    "bluebird": "^3.5.5",
-    "bluebird-retry": "^0.11.0",
-    "chalk": "^2.4.2",
-    "event-target-shim": "^5.0.1",
-    "fast-deep-equal": "^2.0.1",
-    "http-server": "^0.12.3",
-    "jasmine": "^3.4.0",
-    "request": "^2.88.0",
-    "sauce-connect-launcher": "^1.2.7",
-    "saucelabs": "^2.1.9",
-    "selenium-webdriver": "^4.0.0-alpha.4",
-    "typescript": "~3.5.2",
-    "webpack": "^4.35.0",
-    "webpack-cli": "^3.3.5"
-  },
-  "scripts": {
-    "tsc": "npm run tsc-common && npm run tsc-module",
-    "tsc-common": "tsc",
-    "tsc-module": "tsc --module esnext --moduleResolution node --outDir \"module/\" && npm run tsc-to-mjs",
-    "tsc-to-mjs": "bash tsc-to-mjs.sh",
-    "version": "npm run tsc && webpack && git add -A",
-    "build": "npm run tsc && webpack",
-    "serve": "http-server -p 5000 --silent",
-    "tsc-watch": "tsc -w",
-    "test": "npm run tsc && npm run test-core && npm run test-duplex && npm run test-commonjs && npm run test-webpack-import && npm run test-typings",
-    "test-sauce": "npm run build && node test/Sauce/Runner.js",
-    "test-commonjs": "jasmine test/spec/commonjs/requireSpec.js",
-    "test-webpack-import": "webpack --env.NODE_ENV=test && jasmine test/spec/webpack/importSpec.build.js",
-    "test-typings": "tsc test/spec/typings/typingsSpec.ts",
-    "test-duplex": "node --experimental-modules jasmine-run.mjs test/**/*[sS]pec.mjs",
-    "test-core": "node --experimental-modules jasmine-run.mjs 'test/spec/{jsonPatchTestsSpec,coreSpec,validateSpec}.mjs'",
-    "bench": "npm run bench-core && npm run bench-duplex",
-    "bench-core": "node test/spec/coreBenchmark.js",
-    "bench-duplex": "node test/spec/coreBenchmark.js && node test/spec/duplexBenchmark.js"
-  }
-}
+    "name": "fast-json-patch",
+    "version": "3.1.0",
+    "description": "Fast implementation of JSON-Patch (RFC-6902) with duplex (observe changes) capabilities",
+    "homepage": "https://github.com/Starcounter-Jack/JSON-Patch",
+    "keywords": [
+        "json",
+        "patch",
+        "http",
+        "rest"
+    ],
+    "repository": {
+        "type": "git",
+        "url": "git://github.com/Starcounter-Jack/JSON-Patch.git"
+    },
+    "bugs": {
+        "url": "https://github.com/Starcounter-Jack/JSON-Patch/issues"
+    },
+    "author": {
+        "name": "Joachim Wester",
+        "email": "joachimwester@me.com",
+        "url": "http://www.starcounter.com/"
+    },
+    "license": "MIT",
+    "main": "index.js",
+    "module": "index.mjs",
+    "typings": "index.d.ts",
+    "devDependencies": {
+        "benchmark": "^2.1.4",
+        "bluebird": "^3.5.5",
+        "bluebird-retry": "^0.11.0",
+        "chalk": "^2.4.2",
+        "event-target-shim": "^5.0.1",
+        "fast-deep-equal": "^2.0.1",
+        "http-server": "^0.12.3",
+        "jasmine": "^3.4.0",
+        "request": "^2.88.0",
+        "sauce-connect-launcher": "^1.2.7",
+        "saucelabs": "^2.1.9",
+        "selenium-webdriver": "^4.0.0-alpha.4",
+        "typescript": "~3.5.2",
+        "webpack": "^4.35.0",
+        "webpack-cli": "^3.3.5"
+    },
+    "scripts": {
+        "tsc": "npm run tsc-common && npm run tsc-module",
+        "tsc-common": "tsc",
+        "tsc-module": "tsc --module esnext --moduleResolution node --outDir \"module/\" && npm run tsc-to-mjs",
+        "tsc-to-mjs": "bash tsc-to-mjs.sh",
+        "version": "npm run tsc && webpack && git add -A",
+        "build": "npm run tsc && webpack",
+        "serve": "http-server -p 5000 --silent",
+        "tsc-watch": "tsc -w",
+        "test": "npm run tsc && npm run test-core && npm run test-duplex && npm run test-commonjs && npm run test-webpack-import && npm run test-typings",
+        "test-sauce": "npm run build && node test/Sauce/Runner.js",
+        "test-commonjs": "jasmine test/spec/commonjs/requireSpec.js",
+        "test-webpack-import": "webpack --env.NODE_ENV=test && jasmine test/spec/webpack/importSpec.build.js",
+        "test-typings": "tsc test/spec/typings/typingsSpec.ts",
+        "test-duplex": "node --experimental-modules jasmine-run.mjs test/**/*[sS]pec.mjs",
+        "test-core": "node --experimental-modules jasmine-run.mjs 'test/spec/{jsonPatchTestsSpec,coreSpec,validateSpec}.mjs'",
+        "bench": "npm run bench-core && npm run bench-duplex",
+        "bench-core": "node test/spec/coreBenchmark.js",
+        "bench-duplex": "node test/spec/coreBenchmark.js && node test/spec/duplexBenchmark.js"
+    }
+}
\ No newline at end of file