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/features/compose/containers/privacy_dropdown_container.js

@@ -3,14 +3,14 @@ import PrivacyDropdown from '../components/privacy_dropdown';
 import { changeComposeVisibility } from '../../../actions/compose';
 
 const mapStateToProps = state => ({
-  value: state.getIn(['compose', 'privacy'])
+  value: state.getIn(['compose', 'privacy']),
 });
 
 const mapDispatchToProps = dispatch => ({
 
   onChange (value) {
     dispatch(changeComposeVisibility(value));
-  }
+  },
 
 });