[video_player] Don't restart when scrubbing to end (flutter#4488)

[webview_flutter]Add zoom to android webview (flutter#3325)

Fix NullPointerException (flutter#4212)

[webview_flutter] Deprecate evaluateJavascript in favour of runJavaSc…

…ript and runJavaScriptForResult. (flutter#4403)

[webview_flutter] Add interface methods to load local files and HTML …

…strings. (flutter#4446)

* Add methods to load HTML and Flutter assets.

Adds methods to the webview_flutter_platform_interface to support
loading content from Flutter asset defined in the pubspec.yaml of
directly from HTML string.

* Renamed loadHtml to loadHtmlString

* Support loading arbitrary files instead of only Flutter assets

* Update changelog description

* Fix formatting

* Fix formatting

[webview_flutter] Add platform interface method `loadRequest`. (flutt…

…er#4450)