feat(fab): Change node to element.

Author: williamernest

packages/fab/index.js

@@ -42,13 +42,12 @@ Fab.propTypes = {
   mini: PropTypes.bool,
   className: PropTypes.string,
   children: PropTypes.oneOfType([
-    PropTypes.arrayOf(PropTypes.node),
-    PropTypes.node,
-  ]),
+    PropTypes.arrayOf(PropTypes.element),
+    PropTypes.element,
+  ]).isRequired,
 };
 
 Fab.defaultProps = {
   mine: false,
   className: '',
-  children: [],
 };

test/screenshot/fab/standard.js

@@ -8,6 +8,8 @@ import MaterialIcon from '../../../packages/material-icon';
 
 ReactDOM.render((
     <div>
+      <Fab>
+      </Fab>
       <Fab className="demo-button">
         <i className="material-icons">favorite</i>
       </Fab>