build(deps-dev): update mockery/mockery requirement from 1.6.4 to 1.6.6

Updates the requirements on [mockery/mockery](https://github.com/mockery/mockery) to permit the latest version.
- [Release notes](https://github.com/mockery/mockery/releases)
- [Changelog](https://github.com/mockery/mockery/blob/1.6.x/CHANGELOG.md)
- [Commits](mockery/mockery@1.6.4...1.6.6)

---
updated-dependencies:
- dependency-name: mockery/mockery
  dependency-type: direct:development
...

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

composer.json

@@ -22,7 +22,7 @@
     },
     "require-dev": {
         "nette/tester": "2.4.3",
-        "mockery/mockery": "1.6.4",
+        "mockery/mockery": "1.6.6",
         "phpstan/phpstan": "1.10.32",
         "phpstan/phpstan-strict-rules": "1.5.1",
         "phpstan/phpstan-nette": "1.2.9",