Method resize

src/app/script/api/sprite_script.cpp:130–133

  }

  void resize(int w, int h) {
    app::DocumentApi api(doc(), transaction());
    api.setSpriteSize(sprite(), w, h);
  }

  void crop(script::Value x, script::Value y, script::Value w, script::Value h){
    gfx::Rect bounds;