[webview_flutter] Expose loadFile and loadHtmlString through app faci…

…ng package. (flutter#4558)

[webview_flutter] Add a backgroundColor option to the Android webview (…

…flutter#4569)

This PR add an option to set the background color of the Android webview.

Part of: flutter#3431
Part of: flutter/flutter#29300

[webview_flutter] Add a backgroundColor option to the iOS webview (fl…

…utter#4570)

This PR add an option to set the background color of the iOS webview.

Part of flutter#3431
Part of flutter/flutter#29300

[webview_flutter] Adds the `loadFlutterAsset` method to the interface. (

flutter#4562)

[path_provider] Switch macOS to an internal method channel (flutter#4547

)

Eliminates the path_provider_macos reliance on the default, shared method channel implementation, in favor of an in-package implementation.

Now that it's trivial to do so, also moves the creation of directories when necessary to the Dart side, and unit tests it there.

Part of flutter/flutter#94224

[webview_flutter] Add a backgroundColor option to the webview platfor…

…m interface (flutter#4567)

Part of flutter#3431
Part of flutter/flutter#29300

Revert deprecation of clearCookies (flutter#4566)

[webview_flutter] Add supporting interfaces for setting cookies to pl…

…atform interface. (flutter#4555)

[in_app_purchase]Update the version number and CHANGELOG (flutter#4097)

[webview_flutter] Android implementation of `loadFile` and `loadHtmlS…

…tring` methods (flutter#4544)