[FIX] Adds missing get_global_name method

Author: why-try313

javascript.cpp

@@ -23,6 +23,10 @@ bool JavaScript::can_instantiate() const {
 #endif
 }
 
+StringName JavaScript::get_global_name() const {
+	return StringName();
+}
+
 StringName JavaScript::get_instance_base_type() const {
 	static StringName empty;
 	ERR_FAIL_NULL_V(javascript_class, empty);

javascript.h

@@ -43,6 +43,7 @@ class JavaScript : public Script {
 	virtual Ref<Script> get_base_script() const override { return nullptr; }
 	virtual bool inherits_script(const Ref<Script> &p_script) const override { return false; }
 
+	StringName get_global_name() const override;
 	virtual StringName get_instance_base_type() const override;
 	virtual ScriptInstance *instance_create(Object *p_this) override;
 	virtual PlaceHolderScriptInstance *placeholder_instance_create(Object *p_this) override;