Update antd

Summary:
Project doc: https://docs.google.com/document/d/1miofxds9DJgWScj0zFyBbdpRH5Rj0T9FqiCapof5-vU

Required to get `Space.Compact`

allow-large-files

Reviewed By: passy

Differential Revision: D48520383

fbshipit-source-id: 000a5c16c00541455dc4a31c4fddb2c4c252a89e

desktop/flipper-plugin/src/ui/PowerSearch/index.tsx

@@ -94,7 +94,7 @@ export const PowerSearch: React.FC<PowerSearchProps> = ({config}) => {
             },
           ]);
         }}
-        value={null}
+        value={''}
       />
     </div>
   );