chore(package): update mocha to version 7.1.2

Author: greenkeeper[bot]

package.json

@@ -19,7 +19,7 @@
     "json-diff": "0.5.4"
   },
   "devDependencies": {
-    "mocha": "7.1.1",
+    "mocha": "7.1.2",
     "prettier": "^2.0.4",
     "webpack": "^4.42.1",
     "webpack-cli": "^3.3.11",