Update dependency mocha to v6.2.3

Author: renovate-bot

package.json

@@ -41,7 +41,7 @@
     "chai-as-promised": "7.1.1",
     "husky": "3.0.1",
     "inversify": "5.0.1",
-    "mocha": "6.2.0",
+    "mocha": "6.2.3",
     "nyc": "14.1.1",
     "prettier": "1.18.2",
     "reflect-metadata": "0.1.13",