[build_web_compilers] Fix WebAssembly detection logic (#3931)

Fixes #3930

Release build_modules 5.0.12. (#3912)

Release build_web_compilers 4.1.2. (#3895)

Release build_runner 2.4.15. (#3846)

* Release build_runner 2.4.15.

* Update dep onto `build_resolvers`.

Release build_resolvers 2.4.1. (#3843)

Add --use-experimental-resolver flag. (#3831)

* Add --use-experimental-resolver flag.

* Address review comments.

* Fix pubspec.

support 3.8 pre-release sdks (#3795)

* support 3.8 pre-release sdks

* drop usage of dart:html from example, migrate to package:web

support 3.8 pre-release sdks (#3795)

* support 3.8 pre-release sdks

* drop usage of dart:html from example, migrate to package:web

Prep to release packages (#3784)

* prep packages for release, add back to workspace

* update more sdk constraints to 3.6.0

Prep to release packages (#3784)

* prep packages for release, add back to workspace

* update more sdk constraints to 3.6.0