chore(package): update mocha to version 7.1.1

Closes #43

Author: greenkeeper[bot]

package.json

@@ -76,7 +76,7 @@
     "cz-conventional-changelog": "^2.0.0",
     "eslint": "^5.0.0",
     "husky": "^1.0.0",
-    "mocha": "^6.0.0",
+    "mocha": "^7.1.1",
     "nyc": "^14.0.0",
     "rimraf": "^2.6.2"
   }