Improve eslint rules (#3147)

* Add semi to ESLint rules

* Add padded-blocks to ESLint rules

* Add comma-dangle to ESLint rules

* add config/webpack and storyboard

* add streaming/

* yarn test:lint -- --fix

app/javascript/mastodon/actions/store.js

@@ -12,6 +12,6 @@ export function hydrateStore(rawState) {
 
   return {
     type: STORE_HYDRATE,
-    state
+    state,
   };
 };