upgrade to Filament 1.21.0

ios/Classes/FilamentMethodCallHandler.h

@@ -3,21 +3,18 @@
 #endif /* FilamentNativeViewFactory_h */
 
 #import <Flutter/Flutter.h>
-#import "FilamentViewController.h"
 
 #include "FilamentViewer.hpp"
 
+using namespace polyvox;
+
 static const id VIEW_TYPE = @"app.polyvox.filament/filament_view";
 
 @interface FilamentMethodCallHandler : FlutterMethodChannel
 - (void)handleMethodCall:(FlutterMethodCall* _Nonnull)call result:( FlutterResult _Nonnull)result;
 - (polyvox::FilamentViewer*) _viewer;
 - (polyvox::ResourceBuffer)loadResource:(const char* const)path;
-- (void)freeResource:(void*)mem size:(size_t)size misc:(void*)misc;
+- (void)freeResource:(polyvox::ResourceBuffer)rb;
 - (void)ready;
-- (instancetype)initWithController:(FilamentViewController*)controller
-                    registrar:(NSObject<FlutterPluginRegistrar>*)registrar
-                    viewId:(int64_t)viewId
-                    layer:(void*)layer;
-
+- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar viewId:(int64_t)viewId viewer:(FilamentViewer*)viewer;
 @end