chore(package): update coveralls to version 3.0.7

Closes #22

Author: greenkeeper[bot]

package.json

@@ -64,7 +64,7 @@
     "babel-register": "^6.16.3",
     "commitizen": "^2.8.6",
     "conventional-changelog-cli": "^1.2.0",
-    "coveralls": "^2.11.14",
+    "coveralls": "^3.0.7",
     "cz-conventional-changelog": "^1.2.0",
     "eslint": "^3.14.0",
     "eslint-plugin-ava": "^4.0.1",