Revert to Sparkle 2.2.2

This one is sure to run on macOS 10.12
Closes issue #1705

Author: barijaona

Vienna.xcodeproj/project.pbxproj

@@ -3306,8 +3306,8 @@
 			isa = XCRemoteSwiftPackageReference;
 			repositoryURL = "https://github.com/sparkle-project/Sparkle";
 			requirement = {
-				kind = upToNextMajorVersion;
-				minimumVersion = 2.3.0;
+				kind = upToNextMinorVersion;
+				minimumVersion = 2.2.2;
 			};
 		};
 		F6B7BC3424A2A9A40051D76F /* XCRemoteSwiftPackageReference "fmdb" */ = {