chore(package): update eslint to version 5.0.0

Author: greenkeeper[bot]

package.json

@@ -18,7 +18,7 @@
   "description": "Unprefixes vendor prefixes in legacy CSS.",
   "devDependencies": {
     "codecov": "^3.0.0",
-    "eslint": "^4.19.1",
+    "eslint": "^5.0.0",
     "eslint-config-standard": "^11.0.0",
     "eslint-plugin-import": "^2.11.0",
     "eslint-plugin-node": "^6.0.1",