[AltServer] Adds Sparkle support

Pods/Sparkle/Sparkle.framework/Versions/A/Headers/SPUDownloaderSession.h

@@ -0,0 +1,20 @@
+//
+//  SPUDownloaderSession.h
+//  Sparkle
+//
+//  Created by Deadpikle on 12/20/17.
+//  Copyright © 2017 Sparkle Project. All rights reserved.
+//
+
+#if __has_feature(modules)
+@import Foundation;
+#else
+#import <Foundation/Foundation.h>
+#endif
+#import "SPUDownloader.h"
+#import "SPUDownloaderProtocol.h"
+
+NS_CLASS_AVAILABLE(NSURLSESSION_AVAILABLE, 7_0)
+@interface SPUDownloaderSession : SPUDownloader <SPUDownloaderProtocol>
+
+@end