Prepare for dev releases.

[davidmorgan]

freezed needs the fixes in build_test-dev.3, so let's do one more prerelease :)

[github-actions]

PR Health

Changelog Entry ✔️

Package	Changed Files

Changes to files need to be accounted for in their respective changelogs.

[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:build	3.0.0-dev.2	ready to publish	build-v3.0.0-dev.2
package:build_config	1.1.3-wip	WIP (no publish necessary)
package:build_daemon	4.0.5-wip	WIP (no publish necessary)
package:build_modules	5.0.16-wip	WIP (no publish necessary)
package:build_resolvers	3.0.0-dev.2	ready to publish	build_resolvers-v3.0.0-dev.2
package:build_runner	2.6.0-dev.2	ready to publish	build_runner-v2.6.0-dev.2
package:build_runner_core	9.2.0-dev.2	ready to publish	build_runner_core-v9.2.0-dev.2
package:build_test	3.3.0-dev.3	ready to publish	build_test-v3.3.0-dev.3
package:build_web_compilers	4.2.1-wip	WIP (no publish necessary)
package:scratch_space	1.1.0	already published at pub.dev

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[lrhn]

Looks indistinguishable from good to me.