Update slope-it/clock-mock requirement from 0.3.8 to 0.4.0 (#69)

Updates the requirements on [slope-it/clock-mock](https://github.com/slope-it/clock-mock) to permit the latest version.
- [Release notes](https://github.com/slope-it/clock-mock/releases)
- [Commits](slope-it/clock-mock@0.3.8...0.4.0)

---
updated-dependencies:
- dependency-name: slope-it/clock-mock
  dependency-type: direct:development
...

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composer.json

@@ -32,7 +32,7 @@
         "phpunit/phpunit": "^9.5",
         "rector/rector": "^0.18.0",
         "roave/infection-static-analysis-plugin": "^1.25",
-        "slope-it/clock-mock": "0.3.8",
+        "slope-it/clock-mock": "0.4.0",
         "spatie/phpunit-watcher": "^1.23",
         "vimeo/psalm": "^4.30|^5.2"
     },