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

Closes #31

Author: greenkeeper[bot]

package.json

@@ -33,7 +33,7 @@
   "devDependencies": {
     "@types/chai": "4.1.4",
     "@types/lodash": "4.14.131",
-    "@types/mocha": "5.2.6",
+    "@types/mocha": "7.0.2",
     "chai": "4.1.2",
     "lodash": "4.17.15",
     "mocha": "6.1.4"