Update eslint to version 5.0.0 (#364)

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
   },
   "devDependencies": {
     "ava": "^0.25.0",
-    "eslint": "^4.16.0",
+    "eslint": "^5.0.0",
     "eslint-config-i-am-meticulous": "^10.0.0",
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-prettier": "^2.2.0",