composer(deps-dev): update phpstan/phpstan requirement

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Commits](phpstan/phpstan@0.12.78...0.12.80)

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

composer.json

@@ -31,7 +31,7 @@
         "ext-zend-opcache": "*",
         "jangregor/phpstan-prophecy": "^0.8.1",
         "phpspec/prophecy-phpunit": "^2.0",
-        "phpstan/phpstan": "^0.12.78",
+        "phpstan/phpstan": "^0.12.80",
         "phpunit/phpunit": "^9.5.2",
         "roave/security-advisories": "dev-master",
         "squizlabs/php_codesniffer": "^3.5"