chore(package): update coveralls to version 3.0.0

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
   },
   "homepage": "https://github.com/Intellicode/graphql-resolver-cache#readme",
   "devDependencies": {
-    "coveralls": "^2.13.1",
+    "coveralls": "^3.0.0",
     "eslint": "^4.4.1",
     "eslint-config-prettier": "^2.3.0",
     "husky": "^0.14.3",