Adding missing classes and proptypes

plugins/talk-plugin-moderation-actions/client/components/RejectCommentAction.js

@@ -1,12 +1,19 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import cn from 'classnames';
 import styles from './styles.css';
 import {t} from 'plugin-api/beta/client/services';
 import {Icon} from 'plugin-api/beta/client/components/ui';
 
-export default ({rejectComment}) => (
+const RejectCommentAction = ({rejectComment}) => (
   <button className={cn(styles.button, 'talk-plugin-moderation-actions-reject')} onClick={rejectComment}>
     <Icon name="clear" className={styles.icon} />
     {t('talk-plugin-moderation-actions.reject_comment')}
   </button>
 );
+
+RejectCommentAction.propTypes = {
+  rejectComment: PropTypes.func,
+};
+
+export default RejectCommentAction;