Bump analyzer version.

[davidmorgan]

Now that it's possible to roll into google3, require analyzer 8 and remove use of deprecated members so that can roll into google3.

build is ready to publish.

[github-actions]

PR Health

Changelog Entry ❗

Package	Changed Files
package:build_daemon	build_daemon/pubspec.yaml
package:build_test	build_test/pubspec.yaml

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

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[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:build	4.0.2	ready to publish	build-v4.0.2
package:build_config	1.2.0	already published at pub.dev
package:build_daemon	4.0.5-wip	WIP (no publish necessary)
package:build_modules	5.0.18	already published at pub.dev
package:build_runner	2.9.1-wip	WIP (no publish necessary)
package:build_test	3.5.0-wip	WIP (no publish necessary)
package:build_web_compilers	4.3.0	already published at pub.dev
package:scratch_space	1.1.1	already published at pub.dev

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