Allow "static" return type for constructor methods

The constructor methods for value objects (for example `fromArray()`) are considered by the `ValueObjectNormalizer` when events are unserialized from the event store. However, if a `fromArray()` method is declared with a `static` return type, the method is not considered by the normalizer.

This change adds support for those constructors.

Classes/EventStore/Normalizer/ValueObjectNormalizer.php

@@ -15,7 +15,7 @@
  * * they are public
  * * they are static
  * * they expect a single parameter of the given type
- * * they have a "self" or "<TargetClassName>" return type annotation
+ * * they have a "self", "static" or "<TargetClassName>" return type annotation
  *
  * Note: For type "array" a named constructor fromArray() is required!
  */
@@ -116,7 +116,7 @@ private function resolveNamedConstructorMethod(string $dataType, string $classNa
             return null;
         }
         $constructorMethodReturnTypeName = $constructorMethodReturnType->getName();
-        if ($constructorMethodReturnTypeName !== $className && $constructorMethodReturnTypeName !== 'self') {
+        if ($constructorMethodReturnTypeName !== $className && $constructorMethodReturnTypeName !== 'self' && $constructorMethodReturnTypeName !== 'static') {
             return null;
         }
         $this->resolveNamedConstructorMethodCache[$cacheIdentifier] = $constructorMethod;