chore(deps): update dependency @types/mocha to v5.2.7

Author: renovate-bot

package-lock.json

@@ -18,7 +18,7 @@
   },
   "devDependencies": {
     "@types/form-data": "2.2.1",
-    "@types/mocha": "5.2.6",
+    "@types/mocha": "5.2.7",
     "codecov": "3.5.0",
     "conventional-changelog-cli": "2.0.21",
     "fetch-mock": "6.5.2",