`CacheSwitch` re-mount the same component if path changes

[nomyfan]

In Switch, the component will not be re-mounted even if the path changed. Here's a demo to reproduce. https://stackblitz.com/edit/vitejs-vite-4923pg?file=src/App.tsx

• Type something in the input, click Go button, then the component under CacheSwitch will be re-mounted.
• Clear the input, and click Go button, the component under CacheSwitch will be re-mounted.

[nomyfan]

Switch uses React.Children.forEach to capture the matching element, while CacheSwitch uses React.Children.map to return an array(React assigns keys to each child in the array).