forward declare Updater

include/render/gui/UpdateMenu.h

@@ -2,21 +2,28 @@
 
 #include "GuiWidget.h"
 
-#include "updater/Updater.h"
-
 #include <future>
+#include <memory>
 
 namespace td {
+
+namespace utils {
+
+class Updater;
+
+} // namespace utils
+
 namespace gui {
 
 class UpdateMenu : public GuiWidget {
 private:
     bool m_Opened;
     std::string m_Error;
-    utils::Updater m_Updater;
+    std::unique_ptr<utils::Updater> m_Updater;
     std::shared_future<bool> m_UpdateAvailable;
 public:
     UpdateMenu(client::Client* client);
+    virtual ~UpdateMenu();
 
     virtual void Render();
 private: