Bump phpunit/phpunit from 8.3.5 to 8.5.52

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 8.3.5 to 8.5.52.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/8.5.52/ChangeLog-8.5.md)
- [Commits](sebastianbergmann/phpunit@8.3.5...8.5.52)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 8.5.52
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -16,7 +16,7 @@
         "roave/security-advisories": "dev-master",
         "symfony/var-dumper": "5.*|^v4.3|^3.4",
         "symfony/yaml": "5.*|^v4.3|^3.4",
-        "phpunit/phpunit": "~8.3.4",
+        "phpunit/phpunit": "~8.5.52",
         "phpstan/phpstan": "^0.12.7"
     },
     "autoload": {