Bump psalm/plugin-mockery from 0.7.0 to 0.9.0

Bumps [psalm/plugin-mockery](https://github.com/psalm/psalm-plugin-mockery) from 0.7.0 to 0.9.0.
- [Release notes](https://github.com/psalm/psalm-plugin-mockery/releases)
- [Commits](psalm/psalm-plugin-mockery@0.7.0...0.9.0)

---
updated-dependencies:
- dependency-name: psalm/plugin-mockery
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -36,6 +36,6 @@
         "squizlabs/php_codesniffer": "^3.5",
         "php-coveralls/php-coveralls": "^2.4",
         "mockery/mockery": "^1.4",
-        "psalm/plugin-mockery": "^0.7.0"
+        "psalm/plugin-mockery": "^0.7.0 || ^0.9.0"
     }
 }