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/components/load_more.js

@@ -9,7 +9,7 @@ const LoadMore = ({ onClick }) => (
 );
 
 LoadMore.propTypes = {
-  onClick: PropTypes.func
+  onClick: PropTypes.func,
 };
 
 export default LoadMore;