chore(package): update coveralls to version 3.0.0 (#133)

Author: greenkeeper[bot]

package.json

@@ -19,7 +19,7 @@
     "babel-preset-es2015": "^6.18.0",
     "babel-register": "^6.24.0",
     "chai": "^4.1.0",
-    "coveralls": "^2.11.16",
+    "coveralls": "^3.0.0",
     "cross-env": "^3.1.4",
     "mocha": "^4.0.0",
     "nyc": "^11.1.0",