chore(package): update eslint to version 4.7.1

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
   },
   "devDependencies": {
     "coveralls": "^2.11",
-    "eslint": "^4.0",
+    "eslint": "^4.7.1",
     "istanbul": "^0.4",
     "mocha": "^3.4.2",
     "mocha-lcov-reporter": "^1.2.0",