chore(package): update coveralls to version 3.0.1

Closes #63

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
   },
   "devDependencies": {
     "chai": "^4.0.2",
-    "coveralls": "^2.11.16",
+    "coveralls": "^3.0.1",
     "istanbul": "^0.4.5",
     "mocha": "^3.2.0",
     "standard": "^10.0.0",