[AltServer] Adds Sparkle support

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

@@ -0,0 +1,35 @@
+//
+//  SUAppcast.h
+//  Sparkle
+//
+//  Created by Andy Matuschak on 3/12/06.
+//  Copyright 2006 Andy Matuschak. All rights reserved.
+//
+
+#ifndef SUAPPCAST_H
+#define SUAPPCAST_H
+
+#if __has_feature(modules)
+@import Foundation;
+#else
+#import <Foundation/Foundation.h>
+#endif
+#import "SUExport.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class SUAppcastItem;
+SU_EXPORT @interface SUAppcast : NSObject
+
+@property (copy, nullable) NSString *userAgentString;
+@property (copy, nullable) NSDictionary<NSString *, NSString *> *httpHeaders;
+
+- (void)fetchAppcastFromURL:(NSURL *)url inBackground:(BOOL)bg completionBlock:(void (^)(NSError *_Nullable))err;
+- (SUAppcast *)copyWithoutDeltaUpdates;
+
+@property (readonly, copy, nullable) NSArray *items;
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif