Update php-mock/php-mock-phpunit requirement from ^2.10 to ^2.13

Updates the requirements on [php-mock/php-mock-phpunit](https://github.com/php-mock/php-mock-phpunit) to permit the latest version.
- [Release notes](https://github.com/php-mock/php-mock-phpunit/releases)
- [Commits](php-mock/php-mock-phpunit@2.10.0...2.13.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -8,7 +8,7 @@
 	},
 	"require-dev": {
 		"phpunit/phpunit": "^9.6.19",
-		"php-mock/php-mock-phpunit": "^2.10",
+		"php-mock/php-mock-phpunit": "^2.13",
 		"guzzlehttp/psr7": "^2.4",
 		"corpus/coding-standard": "^0.6.0",
 		"squizlabs/php_codesniffer": "^3.11",