fix: Update Package.swift to remove archived flutter/engine dependency

The flutter/engine repository has been archived and moved under flutter/flutter.
Swift Package Manager support in Flutter handles dependencies automatically,
so no explicit Flutter dependencies are needed in Package.swift.

Thanks to @navaronbracke for pointing this out.

Author: ened

workmanager/CHANGELOG.md

@@ -6,7 +6,7 @@
 * iOS: Add Privacy Manifest for App Store compliance by @navaronbracke (from PR #555)
 * iOS: Replace print statements with proper os_log for better logging
 * iOS: printScheduledTasks now returns String instead of void by @yarith28 (from PR #585)
-* iOS: Add Swift Package Manager support for future Flutter compatibility
+* iOS: Add Swift Package Manager support for future Flutter compatibility (Package.swift)
 
 # 0.7.0
 

workmanager/ios/workmanager/Package.swift

@@ -12,13 +12,13 @@ let package = Package(
         .library(name: "workmanager", targets: ["workmanager"])
     ],
     dependencies: [
-        .package(url: "https://github.com/flutter/engine", from: "0.0.0")
+        // No explicit Flutter dependencies needed - handled by Flutter's SPM integration
     ],
     targets: [
         .target(
             name: "workmanager",
             dependencies: [
-                .product(name: "Flutter", package: "engine")
+                // Flutter framework will be automatically available
             ],
             resources: [
                 .process("Resources")