chore(package): update mocha to version 7.2.0

Closes #43

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "@types/node": "^13.1.0",
     "chai": "^4.2.0",
     "husky": "^4.0.2",
-    "mocha": "^6.0.0",
+    "mocha": "^7.2.0",
     "nyc": "^15.0.0",
     "source-map-support": "^0.5.9",
     "ts-node": "^8.1.1",