Add support for Apple Silicon

-Update classes to read correct Apple Silicon CPU sensor
-Update project to compile a Universal 2 binary. Upgraded Sparkle to 2.1.0 as that was the latest and supports ARM64.
-Add MacBookPro18,1 to Machines.plist

Sparkle.framework/Versions/B/Headers/Sparkle.h

@@ -0,0 +1,39 @@
+//
+//  Sparkle.h
+//  Sparkle
+//
+//  Created by Andy Matuschak on 3/16/06. (Modified by CDHW on 23/12/07)
+//  Copyright 2006 Andy Matuschak. All rights reserved.
+//
+
+#ifndef SPARKLE_H
+#define SPARKLE_H
+
+// This list should include the shared headers. It doesn't matter if some of them aren't shared (unless
+// there are name-space collisions) so we can list all of them to start with:
+
+#import <Sparkle/SUExport.h>
+#import <Sparkle/SUAppcast.h>
+#import <Sparkle/SUAppcastItem.h>
+#import <Sparkle/SUStandardVersionComparator.h>
+#import <Sparkle/SPUUpdater.h>
+#import <Sparkle/SPUUpdaterDelegate.h>
+#import <Sparkle/SPUUpdaterSettings.h>
+#import <Sparkle/SUVersionComparisonProtocol.h>
+#import <Sparkle/SUVersionDisplayProtocol.h>
+#import <Sparkle/SUErrors.h>
+#import <Sparkle/SPUUpdatePermissionRequest.h>
+#import <Sparkle/SUUpdatePermissionResponse.h>
+#import <Sparkle/SPUUserDriver.h>
+#import <Sparkle/SPUDownloadData.h>
+
+// UI bits
+#import <Sparkle/SPUStandardUpdaterController.h>
+#import <Sparkle/SPUStandardUserDriver.h>
+#import <Sparkle/SPUStandardUserDriverDelegate.h>
+
+// Deprecated bits
+#import <Sparkle/SUUpdater.h>
+#import <Sparkle/SUUpdaterDelegate.h>
+
+#endif