Merge pull request #2063 from zunda-pixel/fix-warnig-swift6

fix warning 'UIKit' was not imported

Sources/Image/ImageProcessor.swift

@@ -29,6 +29,8 @@ import CoreGraphics
 
 #if canImport(AppKit) && !targetEnvironment(macCatalyst)
 import AppKit
+#else
+import UIKit
 #endif
 
 /// Represents an item which could be processed by an `ImageProcessor`.