chore(package): update coveralls to version 3.1.0

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "babel-preset-env": "^1.6.0",
     "babel-preset-stage-0": "^6.24.1",
     "babel-register": "^6.26.0",
-    "coveralls": "^3.0.0",
+    "coveralls": "^3.1.0",
     "eslint": "^4.5.0",
     "eslint-config-airbnb": "^17.0.0",
     "eslint-plugin-import": "^2.7.0",