chore(package): update coveralls to version 3.0.13

Closes #72

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "babel-register": "^6.16.3",
     "commitizen": "^2.8.6",
     "conventional-changelog-cli": "^1.2.0",
-    "coveralls": "^2.13.1",
+    "coveralls": "^3.0.13",
     "cz-conventional-changelog": "^2.0.0",
     "eslint": "^4.1.1",
     "eslint-plugin-ava": "^4.2.1",