chore(package): update coveralls to version 3.0.1

Closes #44

Author: greenkeeper[bot]

package.json

@@ -20,7 +20,7 @@
   },
   "devDependencies": {
     "ava": "^0.20.0",
-    "coveralls": "^2.13.1",
+    "coveralls": "^3.0.1",
     "nyc": "^11.0.3",
     "source-loader": "^0.2.0",
     "spike-core": "^2.0.0",