LibJS: Add Object::invoke()

Author: https://github.com/linusg
Commit: 9755f8d297
Pull-request: https://github.com/SerenityOS/serenity/pull/2431
Reviewed-by: https://github.com/awesomekling ✅

Libraries/LibJS/Runtime/Object.h

@@ -31,6 +31,7 @@
 #include <LibJS/Forward.h>
 #include <LibJS/Runtime/Cell.h>
 #include <LibJS/Runtime/IndexedProperties.h>
+#include <LibJS/Runtime/MarkedValueList.h>
 #include <LibJS/Runtime/PrimitiveString.h>
 #include <LibJS/Runtime/PropertyName.h>
 #include <LibJS/Runtime/Shape.h>
@@ -107,6 +108,8 @@ public:
     IndexedProperties& indexed_properties() { return m_indexed_properties; }
     void set_indexed_property_elements(Vector<Value>&& values) { m_indexed_properties = IndexedProperties(move(values)); }
 
+    Value invoke(const FlyString& property_name, Optional<MarkedValueList> arguments = {}) const;
+
 private:
     virtual Value get_by_index(u32 property_index) const;
     virtual bool put_by_index(u32 property_index, Value);