Add iOS, watchOS and tvOS min targets to Package.swift (#3)

Author: azarovalex

Package.swift

@@ -9,7 +9,7 @@ let dependencies: [Target.Dependency] = [
 
 let package = Package(
     name: "AdventOfCode",
-    platforms: [.macOS(.v13)],
+    platforms: [.macOS(.v13), .iOS(.v16), .watchOS(.v9), .tvOS(.v16)],
     dependencies: [
         .package(
             url: "https://github.com/apple/swift-algorithms.git",