Merge pull request #86 from wmde/update-eslint

Update eslint to be compatible with Wikibase .eslintrc

Author: manicki

package.json

@@ -29,7 +29,7 @@
     "wikibase-data-values": "^0.10.0"
   },
   "devDependencies": {
-    "eslint": "^3.19.0",
+    "eslint": "^4.19.1",
     "eslint-config-wikimedia": "0.4.0",
     "karma": "^1.7.0",
     "karma-cli": "^1.0.1",