chore(package): update mocha to version 7.1.1

Closes #28

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "coveralls": "^3.0.2",
     "editorconfig-tools": "^0.1.1",
     "eslint": "^6.0.0",
-    "mocha": "^6.1.2",
+    "mocha": "^7.1.1",
     "nock": "^11.1.0",
     "nyc": "^14.0.0",
     "proxyquire": "^2.0.1",