chore(package): update @types/mocha to version 7.0.2

Closes #35

Author: greenkeeper[bot]

package.json

@@ -54,7 +54,7 @@
     "devDependencies": {
         "@types/bluebird": "^3.5.26",
         "@types/chai": "^4.1.7",
-        "@types/mocha": "^5.2.6",
+        "@types/mocha": "^7.0.2",
         "@types/sinon": "^7.0.11",
         "bluebird": "^3.5.4",
         "browserify-versionify": "^1.0.6",