build(deps-dev): update phpstan/phpstan-strict-rules requirement (#692)

Updates the requirements on [phpstan/phpstan-strict-rules](https://github.com/phpstan/phpstan-strict-rules) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan-strict-rules/releases)
- [Commits](phpstan/phpstan-strict-rules@1.5.2...1.6.1)

---
updated-dependencies:
- dependency-name: phpstan/phpstan-strict-rules
  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

@@ -39,7 +39,7 @@
 		"phpstan/phpstan-deprecation-rules": "1.2.1",
 		"phpstan/phpstan-nette": "1.3.8",
 		"phpstan/phpstan-mockery": "1.1.3",
-		"phpstan/phpstan-strict-rules": "1.5.2",
+		"phpstan/phpstan-strict-rules": "1.6.1",
 		"nextras/multi-query-parser": "~1.0",
 		"nextras/orm-phpstan": "^1.0.1",
 		"tracy/tracy": "~2.3"

src/Entity/Reflection/MetadataParser.php

@@ -536,11 +536,12 @@ protected function initPrimaryKey(): void
 			return;
 		}
 
-		$primaryKey = array_values(array_filter(array_map(function (PropertyMetadata $metadata): ?string {
-			return $metadata->isPrimary && !$metadata->isVirtual
-				? $metadata->name
-				: null;
-		}, $this->metadata->getProperties())));
+		$primaryKey = [];
+		foreach ($this->metadata->getProperties() as $metadata) {
+			if ($metadata->isPrimary && !$metadata->isVirtual) {
+				$primaryKey[] = $metadata->name;
+			}
+		}
 
 		if (count($primaryKey) === 0) {
 			throw new InvalidStateException("Entity {$this->reflection->name} does not have defined any primary key.");