chore(package): update mocha to version 7.1.0

Closes #3

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
     "@types/mocha": "^5.2.6",
     "@types/node": "~11.9.4",
     "@types/sinon": "^7.0.5",
-    "mocha": "6.0.0",
+    "mocha": "7.1.0",
     "node-mocks-http": "^1.7.3",
     "sinon": "^7.2.3",
     "ts-node": "^8.0.2",