Bump phpunit/phpunit from 9.0.1 to 9.0.2 in /dev-tools

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.0.1 to 9.0.2.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-9.0.md)
- [Commits](sebastianbergmann/phpunit@9.0.1...9.0.2)

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

Author: dependabot-preview[bot]

dev-tools/composer.json

@@ -12,7 +12,7 @@
         "phpmd/phpmd": "^2.8.2",
         "phpstan/phpstan": "^0.12.18",
         "phpstan/phpstan-strict-rules": "^0.12.2",
-        "phpunit/phpunit": "^9.0.1",
+        "phpunit/phpunit": "^9.0.2",
         "squizlabs/php_codesniffer": "^3.5.4",
         "vimeo/psalm": "^3.10.1"
     },