chore(package): update coveralls to version 3.0.7

Closes #46

Author: greenkeeper[bot]

package.json

@@ -70,7 +70,7 @@
     "babel-plugin-external-helpers": "^6.22.0",
     "babel-polyfill": "^6.23.0",
     "babel-preset-es2015": "^6.24.0",
-    "coveralls": "^2.12.0",
+    "coveralls": "^3.0.7",
     "jest": "^21.0.0",
     "jsdoc-to-markdown": "^4.0.0",
     "jest-cli": "^21.0.0",