chore(package): update @types/mocha to version 7.0.1

Closes #129

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
     "@types/debug": "4.1.0",
     "@types/dotenv": "^6.1.0",
     "@types/express": "4.17.0",
-    "@types/mocha": "^5.2.7",
+    "@types/mocha": "^7.0.1",
     "@types/mongodb": "^3.1.14",
     "@types/mongoose": "5.5.7",
     "@types/morgan": "^1.7.32",