chore(deps): update dependency mocha to v6.2.0

Author: renovate-bot

package-lock.json

@@ -78,7 +78,7 @@
     "git-issues": "1.3.1",
     "github-post-release": "1.13.1",
     "license-checker": "24.1.0",
-    "mocha": "6.1.4",
+    "mocha": "6.2.0",
     "mocked-env": "1.3.1",
     "pre-git": "3.17.1",
     "prettier-standard": "8.0.1",