chore(package): update coveralls to version 3.0.5

Closes #8

Author: greenkeeper[bot]

package.json

@@ -12,7 +12,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "coveralls": "^2.11.15",
+    "coveralls": "^3.0.5",
     "tap": "^10.3.2"
   },
   "keywords": [