[image_picker_ios] fix wrong plugin name (flutter#6072)

[google_sign_in] Support Dart-based configuration and `serverClientId` (

flutter#5250)

[google_sign_in] Implement Dart-based configuration and `serverClient…

…Id` (flutter#6034)

[google_sign_in] Implement Dart-based configuration and `serverClient…

…Id` (flutter#6034)

[google_sign_in] Implement Dart-based configuration and `serverClient…

…Id` (flutter#6034)

[webview_flutter] fix: unreliable encoding for web (flutter#5737)

[tools] Allow pre-release versions (flutter#6061)

[tools] Allow skipping packages by Dart version (flutter#6038)

Added ability to purchase multiple quantity of one product (flutter#5711

)

[path_provider] Fixed support for querying the root external storage …

…directory (flutter#6036)