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/packs/application.js

@@ -4,7 +4,7 @@ if (!window.Intl || !Object.assign || !Number.isNaN ||
     !window.Symbol || !Array.prototype.includes) {
   // load polyfills dynamically
   import('../mastodon/polyfills').then(main).catch(e => {
-    console.error(e) // eslint-disable-line no-console
+    console.error(e); // eslint-disable-line no-console
   });
 } else {
   main();