Repair eslint wraning (#2453)

frontend/src/pages/drafts/drafts-view.js

@@ -1,7 +1,16 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { siteRoot, gettext } from '../../utils/constants';
 import { Link } from '@reach/router';
 
+const propTypes = {
+  currentTab: PropTypes.string.isRequired,
+  children: PropTypes.oneOfType([
+    PropTypes.array,
+    PropTypes.object
+  ]).isRequired,
+};
+
 class DraftsView extends React.Component {
   
   constructor(props) {
@@ -14,7 +23,7 @@ class DraftsView extends React.Component {
   tabItemClick = (param) => {
     this.setState({
       currentTab: param  
-    })
+    });
   }
   
   render() {
@@ -40,4 +49,6 @@ class DraftsView extends React.Component {
   }
 }
 
+DraftsView.propTypes = propTypes;
+
 export default DraftsView;