fix: [Search] fix type

Author: akai

demo/src/demo/OrdderSelector.tsx

@@ -25,7 +25,7 @@ export default () => {
                 onSearch={(q) => {
                   console.log(q);
                 }}
-                onCancel={() => {
+                onClear={() => {
                   console.log('cancel');
                 }}
               />

src/components/Search/index.tsx

@@ -13,7 +13,7 @@ export interface SearchProps extends Omit<InputProps, 'value'> {
   disabled?: boolean;
   clearable?: boolean;
   showSearch?: boolean;
-  onSearch: (
+  onSearch?: (
     query: string,
     event: React.KeyboardEvent<HTMLInputElement> | React.MouseEvent<HTMLButtonElement, MouseEvent>,
   ) => void;