chore(deps): update dependency mocha to v6.2.2 (#38)

Author: renovate[bot]

package-lock.json

@@ -81,7 +81,7 @@
     "git-issues": "1.3.1",
     "if-node-version": "1.1.1",
     "license-checker": "15.0.0",
-    "mocha": "6.1.4",
+    "mocha": "6.2.2",
     "nsp": "2.8.1",
     "prettier-standard": "7.0.3",
     "schema-shot": "1.9.0",