chore(package): update mocha to version 7.1.1

Closes #3

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",
     "coveralls": "^3.0.2",
-    "mocha": "^6.0.0",
+    "mocha": "^7.1.1",
     "mocha-lcov-reporter": "^1.3.0",
     "nyc": "^13.2.0"
   }