chore(package): update mocha to version 7.2.0

Closes #31

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "axios": "^0.19.2",
     "chai": "^4.2.0",
     "mkdirp": "^0.5.1",
-    "mocha": "^5.0.4",
+    "mocha": "^7.2.0",
     "nyc": "^12.0.1",
     "rimraf": "^2.6.2",
     "ts-node": "^8.6.2",