Update phpunit/phpunit requirement from ~10.0.7 to ~10.1.1 (#54)

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.1.1/ChangeLog-10.1.md)
- [Commits](sebastianbergmann/phpunit@10.0.7...10.1.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.json

@@ -13,7 +13,7 @@
 		"wmde/fun-validators": "~4.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "~10.0.7",
+		"phpunit/phpunit": "~10.1.1",
 		"wmde/fundraising-phpcs": "~8.0",
 		"phpstan/phpstan": "~1.7"
 	},