increase phpstan level to 6

phpstan.neon

@@ -1,5 +1,6 @@
 parameters:
-	level: 5
+	level: 6
+	checkMissingIterableValueType: false
 
 	paths:
 		- src

src/Schema/Elements/AnyOf.php

@@ -63,7 +63,7 @@ public function normalize(mixed $value, Context $context): mixed
 	}
 
 
-	public function merge($value, $base): mixed
+	public function merge(mixed $value, mixed $base): mixed
 	{
 		if (is_array($value) && isset($value[Helpers::PreventMerging])) {
 			unset($value[Helpers::PreventMerging]);

src/Schema/Elements/Base.php

@@ -30,7 +30,7 @@ trait Base
 	private ?string $deprecated = null;
 
 
-	public function default($value): self
+	public function default(mixed $value): self
 	{
 		$this->default = $value;
 		return $this;
@@ -161,7 +161,7 @@ private function isInRange(mixed $value, array $range): bool
 	}
 
 
-	private function doFinalize(mixed $value, Context $context)
+	private function doFinalize(mixed $value, Context $context): mixed
 	{
 		if ($this->castTo) {
 			if (Nette\Utils\Validators::isBuiltinType($this->castTo)) {
@@ -183,7 +183,7 @@ private function doFinalize(mixed $value, Context $context)
 					Nette\Schema\Message::FailedAssertion,
 					['value' => $value, 'assertion' => $expected],
 				);
-				return;
+				return null;
 			}
 		}
 

src/Schema/Elements/Structure.php

@@ -43,7 +43,7 @@ public function __construct(array $items)
 	}
 
 
-	public function default($value): self
+	public function default(mixed $value): self
 	{
 		throw new Nette\InvalidStateException('Structure cannot have default value.');
 	}
@@ -110,7 +110,7 @@ public function normalize(mixed $value, Context $context): mixed
 	}
 
 
-	public function merge(mixed $value, $base): mixed
+	public function merge(mixed $value, mixed $base): mixed
 	{
 		if (is_array($value) && isset($value[Helpers::PreventMerging])) {
 			unset($value[Helpers::PreventMerging]);

src/Schema/Elements/Type.php

@@ -130,7 +130,7 @@ public function normalize(mixed $value, Context $context): mixed
 	}
 
 
-	public function merge(mixed $value, $base): mixed
+	public function merge(mixed $value, mixed $base): mixed
 	{
 		if (is_array($value) && isset($value[Helpers::PreventMerging])) {
 			unset($value[Helpers::PreventMerging]);

src/Schema/Processor.php

@@ -24,7 +24,7 @@ final class Processor
 	private bool $skipDefaults = false;
 
 
-	public function skipDefaults(bool $value = true)
+	public function skipDefaults(bool $value = true): void
 	{
 		$this->skipDefaults = $value;
 	}
@@ -34,7 +34,7 @@ public function skipDefaults(bool $value = true)
 	 * Normalizes and validates data. Result is a clean completed data.
 	 * @throws ValidationException
 	 */
-	public function process(Schema $schema, $data): mixed
+	public function process(Schema $schema, mixed $data): mixed
 	{
 		$this->createContext();
 		$data = $schema->normalize($data, $this->context);