chore(deps): update dependency mocha to v6.2.2 (#458)

Author: renovate[bot]

package.json

@@ -63,7 +63,7 @@
     "eslint-plugin-node": "10.0.0",
     "eslint-plugin-promise": "4.2.1",
     "eslint-plugin-standard": "4.0.1",
-    "mocha": "6.2.0",
+    "mocha": "6.2.2",
     "mock-git": "2.0.0",
     "mockery": "2.1.0",
     "nyc": "14.1.1",