chore(package): update eslint to version 4.1.0

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "coverage": "cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js"
   },
   "peerDependencies": {
-    "eslint": "2.x - 3.x",
+    "eslint": "4.1.0",
     "react": "^15.x",
     "react-dom": "^15.x"
   },