Support package:vm_service 15.x

[bkonyi]

No description provided.

[github-actions]

PR Health

Changelog Entry ✔️

Package	Changed Files

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

[jakemac53]

I don't see the 15.x version available on pub, so we can't test against it on CI to make sure it works. Have you confirmed it does work with a path override, or can you elaborate on what the changes will be?

In general, we would prefer to wait to publish until we can get a solve for that dependency.

If this is to unblock development in the vm_service package itself, you can use a dependency override in that package to force the latest version of package:test.

[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:test	1.25.10	ready to publish	test-v1.25.10
package:test_core	0.6.7	ready to publish	test_core-v0.6.7
package:checks	0.3.1-wip	WIP (no publish necessary)
package:fake_async	1.3.2	already published at pub.dev
package:matcher	0.12.18-wip	WIP (no publish necessary)
package:test_api	0.7.4	already published at pub.dev

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