[webview_flutter] Add support for passing a failing url (flutter#2763)

[image_picker] iOS: fix bug, sometimes double click cancel button wil…

…l crash (flutter#2625)

[google_sign_in] Add ability to return serverAuthCode (flutter#2116)

[google_maps_flutter] Add liteModeEnabled option (flutter#2449)

[url_launcher_web] Launch mailto urls in same window in Safari (flutt…

…er#2740)

This uses package:platform_detect to determine whether the app is running in Safari or not.

https://pub.dev/packages/platform_detect

Co-authored-by: David Iglesias Teixeira <[email protected]>

update lower dart bound to 2.1.0 (flutter#2751)

update lower dart bound to 2.1.0 (flutter#2751)

update lower dart bound to 2.1.0 (flutter#2751)

update lower dart bound to 2.1.0 (flutter#2751)

update lower dart bound to 2.1.0 (flutter#2751)