1.8.1

Normalized CI tooling and added a monthly dependabot configuration. Removed the tracked .coveralls.yml, and started ignoring /.phpunit.cache/ — the rule only covered the pre-10 .phpunit.result.cache name.

Test doubles that configure no expectations are now stubs, and six with('config') constraints gained an invocation count, so the argument assertions are actually checked. ConfigWriterFactoryTest builds its container per test rather than sharing one from setUp.

Development tooling now at phpunit ^11.0 || ^12.0 || ^13.0, psalm ^6.14, laminas-coding-standard ^3.1.

No runtime behaviour changes. The only src/ edits are #[Override] attributes and their imports, so this is a patch release.