chore(package): update mocha to version 7.1.1

Closes #86

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "fs-extra": "^8.1.0",
     "husky": "^3.1.0",
     "lint-staged": "^9.5.0",
-    "mocha": "^6.2.2",
+    "mocha": "^7.1.1",
     "mocha-junit-reporter": "^1.23.1",
     "nyc": "^14.1.1",
     "prettier-standard": "^16.1.0",