diff --git a/package-lock.json b/package-lock.json
index d5c309e..6659e07 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -102,6 +102,7 @@
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       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
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+      "optional": true,
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         "kind-of": "^3.0.2",
         "longest": "^1.0.1",
@@ -691,16 +692,6 @@
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-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
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-          "dev": true,
-          "requires": {
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-            "esprima": "^4.0.0"
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           "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
@@ -1041,16 +1032,6 @@
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-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
-          "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
-          "dev": true,
-          "requires": {
-            "argparse": "^1.0.7",
-            "esprima": "^4.0.0"
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           "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
@@ -1875,7 +1856,8 @@
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-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2081,9 +2063,9 @@
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-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.10.0.tgz",
-      "integrity": "sha512-O2v52ffjLa9VeM43J4XocZE//WT9N0IiwDa3KSHH7Tu8CtH+1qM8SIZvnsTh6v+4yFy5KUY3BHUVwjpfAWsjIA==",
+      "version": "3.13.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+      "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
       "dev": true,
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@@ -2190,6 +2172,7 @@
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       "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
       "dev": true,
+      "optional": true,
       "requires": {
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       }
@@ -2341,7 +2324,8 @@
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       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2568,16 +2552,6 @@
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           "dev": true
         },
-        "js-yaml": {
-          "version": "3.13.1",
-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
-          "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
-          "dev": true,
-          "requires": {
-            "argparse": "^1.0.7",
-            "esprima": "^4.0.0"
-          }
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@@ -3538,18 +3512,6 @@
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-          "version": "3.13.1",
-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
-          "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
-          "dev": true,
-          "requires": {
-            "argparse": "^1.0.7",
-            "esprima": "^4.0.0"
-          }
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@@ -3625,7 +3587,8 @@
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       "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "request": {
       "version": "2.88.0",