diff --git a/package-lock.json b/package-lock.json
index 852846a..70440f6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,14 +14,14 @@
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@@ -175,13 +169,13 @@
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@@ -3227,6 +2605,21 @@
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@@ -3274,6 +2676,12 @@
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@@ -3311,6 +2719,27 @@
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+      "dev": true,
+      "requires": {
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@@ -3377,6 +2806,15 @@
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+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.10.0.tgz",
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+      "requires": {
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+      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
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+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.3.tgz",
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@@ -3497,6 +2959,52 @@
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+      "resolved": "https://registry.npmjs.org/spawn-wrap/-/spawn-wrap-1.4.2.tgz",
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+      "dev": true,
+      "requires": {
+        "foreground-child": "^1.5.6",
+        "mkdirp": "^0.5.0",
+        "os-homedir": "^1.0.1",
+        "rimraf": "^2.6.2",
+        "signal-exit": "^3.0.2",
+        "which": "^1.3.0"
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+    "spdx-correct": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.0.tgz",
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+      "dev": true,
+      "requires": {
+        "spdx-expression-parse": "^3.0.0",
+        "spdx-license-ids": "^3.0.0"
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+    },
+    "spdx-exceptions": {
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+      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.2.0.tgz",
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+      "dev": true
+    },
+    "spdx-expression-parse": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-3.0.0.tgz",
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+      "dev": true,
+      "requires": {
+        "spdx-exceptions": "^2.1.0",
+        "spdx-license-ids": "^3.0.0"
+      }
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+    "spdx-license-ids": {
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+      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.4.tgz",
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@@ -3588,6 +3096,12 @@
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       }
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+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
+      "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
@@ -3605,6 +3119,18 @@
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       "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc="
     },
+    "test-exclude": {
+      "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-5.2.2.tgz",
+      "integrity": "sha512-N2pvaLpT8guUpb5Fe1GJlmvmzH3x+DAKmmyEQmFP792QcLYoGE1syxztSvPD1V8yPe6VrcCt6YGQVjSRjCASsA==",
+      "dev": true,
+      "requires": {
+        "glob": "^7.1.3",
+        "minimatch": "^3.0.4",
+        "read-pkg-up": "^4.0.0",
+        "require-main-filename": "^2.0.0"
+      }
+    },
     "through": {
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       "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
@@ -3680,6 +3206,26 @@
         "is-typedarray": "^1.0.0"
       }
     },
+    "uglify-js": {
+      "version": "3.5.4",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.5.4.tgz",
+      "integrity": "sha512-GpKo28q/7Bm5BcX9vOu4S46FwisbPbAmkkqPnGIpKvKTM96I85N6XHQV+k4I6FA2wxgLhcsSyHoNhzucwCflvA==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "commander": "~2.20.0",
+        "source-map": "~0.6.1"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true,
+          "optional": true
+        }
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+    },
     "util-deprecate": {
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       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -3693,6 +3239,16 @@
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       "dev": true
     },
+    "validate-npm-package-license": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
+      "dev": true,
+      "requires": {
+        "spdx-correct": "^3.0.0",
+        "spdx-expression-parse": "^3.0.0"
+      }
+    },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
@@ -3752,6 +3308,12 @@
         "string-width": "^1.0.2 || 2"
       }
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+    "wordwrap": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
+      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
+      "dev": true
+    },
     "wrap-ansi": {
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       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
@@ -3790,12 +3352,29 @@
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       "dev": true
     },
+    "write-file-atomic": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.2.tgz",
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+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.11",
+        "imurmurhash": "^0.1.4",
+        "signal-exit": "^3.0.2"
+      }
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     "y18n": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
       "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
       "dev": true
     },
+    "yallist": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
+      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+      "dev": true
+    },
     "yargs": {
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       "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.2.2.tgz",
diff --git a/package.json b/package.json
index 02edeb3..fab868e 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "chai": "^4.1.1",
     "coveralls": "^3.0.0",
     "mocha": "~6.1.0",
-    "nyc": "^13.2.0",
+    "nyc": "^14.0.0",
     "wav-decoder": "^1.3.0"
   },
   "license": "MIT"