diff --git a/package-lock.json b/package-lock.json
index 40a1a26..a4f3c67 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -7548,6 +7863,12 @@
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@@ -8471,6 +8792,26 @@
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+      "dev": true,
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+    "string.prototype.trimright": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimright/-/string.prototype.trimright-2.1.0.tgz",
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+      "dev": true,
+      "requires": {
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@@ -8511,12 +8852,20 @@
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+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.0.0.tgz",
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       "dev": true,
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-        "has-flag": "^2.0.0"
+        "has-flag": "^3.0.0"
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+      "dependencies": {
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+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
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@@ -8806,6 +9155,15 @@
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       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
+    "wide-align": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
+      "dev": true,
+      "requires": {
+        "string-width": "^1.0.2 || 2"
+      }
+    },
     "windows-release": {
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       "resolved": "https://registry.npmjs.org/windows-release/-/windows-release-3.2.0.tgz",
@@ -9034,6 +9392,93 @@
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+    "yargs-unparser": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
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+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.15",
+        "yargs": "^13.3.0"
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+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
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+        "get-caller-file": {
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+          "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
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+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
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+        "lodash": {
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+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
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+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
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+            "is-fullwidth-code-point": "^2.0.0",
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+        "strip-ansi": {
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+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
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+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
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+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.0.tgz",
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+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
+            "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",
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diff --git a/package.json b/package.json
index 41f3f99..b7fa49a 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
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     "eslint-plugin-mocha": "^4.11.0",
     "eslint-plugin-prettier": "^2.6.0",
-    "mocha": "^4.1.0",
+    "mocha": "^6.2.2",
     "nyc": "^13.3.0",
     "prettier": "^1.10.2",
     "sinon": "^7.2.3"