tauri@2.0.0-alpha.7

Change minimum Android SDK version to 21 for the plugin library.
- db4c9dc6 feat(core): add option to configure Android’s minimum SDK version (#6651) on 2023-04-07
Improve the run_mobile_plugin function error handling.
- f0570d9f feat(core): improve run_mobile_plugin error handling (#6655) on 2023-04-07
Implement Clone for plugin::PluginHandle.
- 052c5822 feat(core): implement Clone for PluginHandle (#6644) on 2023-04-05