fix: remove transfer warning #4574

Author: tangjinzhou

components/transfer/index.jsx

@@ -19,8 +19,8 @@ import Base from '../base';
 export const TransferDirection = 'left' | 'right';
 
 export const TransferItem = {
-  key: PropTypes.string.isRequired,
-  title: PropTypes.string.isRequired,
+  key: PropTypes.string,
+  title: PropTypes.string,
   description: PropTypes.string,
   disabled: PropTypes.bool,
 };

components/transfer/list.jsx

@@ -11,8 +11,8 @@ import addEventListener from '../vc-util/Dom/addEventListener';
 const defaultRender = () => null;
 
 const TransferItem = {
-  key: PropTypes.string.isRequired,
-  title: PropTypes.string.isRequired,
+  key: PropTypes.string,
+  title: PropTypes.string,
   description: PropTypes.string,
   disabled: PropTypes.bool,
 };