chore(package): update eslint to version 5.16.0

Closes #5

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
   "author": "Jason Miller <jason@developit.ca> (http://jasonformat.com)",
   "license": "MIT",
   "devDependencies": {
-    "eslint": "^4.13.1",
+    "eslint": "^5.16.0",
     "eslint-config-developit": "^1.1.1",
     "microbundle": "^0.4.1"
   },