xo: react/jsx-key (#767)

* Add key to array element

* Enable react/jsx-key rule for xo

* Change key to tabs-list

* Update key name

* Add key for border element

* Add missing JSX keys

lib/components/split-pane.js

@@ -91,11 +91,16 @@ export default class SplitPane extends Component {
             flexGrow: 0
           };
           return [
-            <div className={css('pane')} style={style}>
+            <div
+              key="pane"
+              className={css('pane')}
+              style={style}
+              >
               { child }
             </div>,
             i < children.length - 1 ?
               <div
+                key="divider"
                 onMouseDown={this.handleDragStart}
                 style={{backgroundColor: borderColor}}
                 className={css('divider', `divider_${direction}`)}

package.json

@@ -69,7 +69,6 @@
       "import/no-extraneous-dependencies": 0,
       "no-warning-comments": 0,
       "complexity": 0,
-      "react/jsx-key": 0,
       "no-nested-ternary": 0,
       "react/jsx-no-bind": 0
     },