chore(package): update coveralls to version 2.11.14

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -44,7 +44,7 @@
     "react": "^15.0"
   },
   "devDependencies": {
-    "coveralls": "^2.11.12",
+    "coveralls": "^2.11.14",
     "istanbul": "^0.4.4",
     "mocha": "^3.0",
     "mocha-lcov-reporter": "1.2.0",