Flutter 1.22.0-12.3.pre released to beta

[Patrick Sosinski]

Hi,

Flutter 1.22.0-12.3.pre is now available on the beta channel.  This is our 3rd* beta release from the 1.22 release branch.  This release contains Dart 2.10.0.

1.22.0-12.3.pre 

Notable cherrypicks:

• https://github.com/flutter/flutter/issues/65991 - iOS 14 Invalid Binary due to a font issue

• https://github.com/flutter/flutter/issues/65402 - iOS VM service may take a long time to attach.

• https://github.com/flutter/flutter/issues/66036 - Issue closing the Android keyboard.

• https://github.com/flutter/flutter/issues/66161 - Relaunching debug iOS 14 app may show a white screen.

Thanks!

patrick, on behalf of the Flutter & Dart teams.

* we released 1.22.0-12.2.pre on Monday (Sept 28) and notable cherrypicks for that release are included in this e-mail.