feat(slider): support adjust value by keyboard (#1493) · Aybrea/varlet@4670877

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/setup-node@v3, codecov/codecov-action@v1. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.