Update minimum macOS version

Author: colemancda

Demo/Package.swift

@@ -4,11 +4,7 @@ import PackageDescription
 let package = Package(
     name: "SwiftAndroidApp",
     platforms: [
-      .macOS(.v13),
-      .iOS(.v13),
-      .tvOS(.v13),
-      .watchOS(.v6),
-      .macCatalyst(.v13),
+      .macOS(.v15),
     ],
     products: [
         .library(

Package.swift

@@ -19,7 +19,7 @@ let ndkBinder = sdkVersion >= 29 // binder_ndk Requires API 29
 var package = Package(
     name: "SwiftAndroid",
     platforms: [
-        .macOS(.v10_15)
+        .macOS(.v15)
     ],
     products: [
         .library(