fix: support custom children

test case: https://github.com/react-component/collapse/blob/aac303a8b6ff30e35060b4f8fecde6f4556fcbe2/src/Collapse.tsx#L15

Author: Wxh16144

src/Collapse.tsx

@@ -154,20 +154,23 @@ const Collapse = React.forwardRef<HTMLDivElement, CollapseProps>((props, ref) =>
       }
 
       return (
-        <CollapsePanel
-          prefixCls={prefixCls}
-          key={key}
-          panelKey={key}
-          isActive={isActive}
-          accordion={accordion}
-          collapsible={mergeCollapsible}
-          onItemClick={handleItemClick}
-          destroyInactivePanel={mergeDestroyInactivePanel}
-          expandIcon={rawExpandIcon}
-          {...restProps}
-        >
-          {children}
-        </CollapsePanel>
+        <>
+          <CollapsePanel
+            prefixCls={prefixCls}
+            key={key}
+            panelKey={key}
+            isActive={isActive}
+            accordion={accordion}
+            collapsible={mergeCollapsible}
+            onItemClick={handleItemClick}
+            destroyInactivePanel={mergeDestroyInactivePanel}
+            expandIcon={rawExpandIcon}
+            {...restProps}
+          >
+            {children}
+          </CollapsePanel>
+          {props.children}
+        </>
       );
     });
 

src/interface.ts

@@ -21,9 +21,6 @@ export interface CollapseProps {
   destroyInactivePanel?: boolean;
   expandIcon?: (props: object) => React.ReactNode;
   collapsible?: CollapsibleType;
-  /**
-   * @deprecated use `items` instead, will be removed in `v4.0.0`
-   */
   children?: React.ReactNode;
   /**
    * Collapse items content