Update min version

Package.swift

@@ -5,7 +5,7 @@ import PackageDescription
 
 let package = Package(
     name: "ResgenSwift",
-    platforms: [.macOS(.v14)],
+    platforms: [.macOS(.v14), .iOS(.v15)],
     dependencies: [
         // Dependencies declare other packages that this package depends on.
         .package(