Merge pull request #20 from SimplePEG/greenkeeper/coveralls-3.0.0

Update coveralls to the latest version 🚀

Author: obenjiro

package.json

@@ -30,7 +30,7 @@
   "homepage": "https://github.com/SimplePEG/JavaScript#readme",
   "devDependencies": {
     "chai": "^4.1.0",
-    "coveralls": "^2.11.9",
+    "coveralls": "^3.0.0",
     "eslint": "^4.4.1",
     "istanbul": "^0.4.4",
     "mocha": "^4.0.1",