Update coveralls requirement from ^2.11.2 to ^3.0.2

Updates the requirements on [coveralls](https://github.com/nickmerwin/node-coveralls) to permit the latest version.
- [Release notes](https://github.com/nickmerwin/node-coveralls/releases)
- [Commits](https://github.com/nickmerwin/node-coveralls/commits/3.0.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "chai": "^1.9.1",
-    "coveralls": "^2.11.2",
+    "coveralls": "^3.0.2",
     "gulp": "^3.8.9",
     "gulp-istanbul": "^0.5.0",
     "gulp-jshint": "^1.8.6",