Hub package compatible with StrictConcurrency (#192)

* Sendable Hub.Downloader, Hub.Hub and Hub.HubApi

* Sendable Hub.Downloader, Hub.Hub and Hub.HubApi .2

Author: piotrkowalczuk

Package.swift

@@ -1,8 +1,13 @@
-// swift-tools-version: 5.8
+// swift-tools-version: 5.9
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
+/// Define the strict concurrency settings to be applied to all targets.
+let swiftSettings: [SwiftSetting] = [
+    .enableExperimentalFeature("StrictConcurrency"),
+]
+
 let package = Package(
     name: "swift-transformers",
     platforms: [.iOS(.v16), .macOS(.v13)],
@@ -24,13 +29,13 @@ let package = Package(
             ]
         ),
         .executableTarget(name: "HubCLI", dependencies: ["Hub", .product(name: "ArgumentParser", package: "swift-argument-parser")]),
-        .target(name: "Hub", resources: [.process("FallbackConfigs")]),
+        .target(name: "Hub", resources: [.process("FallbackConfigs")], swiftSettings: swiftSettings),
         .target(name: "Tokenizers", dependencies: ["Hub", .product(name: "Jinja", package: "Jinja")]),
         .target(name: "TensorUtils"),
         .target(name: "Generation", dependencies: ["Tokenizers", "TensorUtils"]),
         .target(name: "Models", dependencies: ["Tokenizers", "Generation", "TensorUtils"]),
         .testTarget(name: "TokenizersTests", dependencies: ["Tokenizers", "Models", "Hub"], resources: [.process("Resources"), .process("Vocabs")]),
-        .testTarget(name: "HubTests", dependencies: ["Hub", .product(name: "Jinja", package: "Jinja")]),
+        .testTarget(name: "HubTests", dependencies: ["Hub", .product(name: "Jinja", package: "Jinja")], swiftSettings: swiftSettings),
         .testTarget(name: "PreTokenizerTests", dependencies: ["Tokenizers", "Hub"]),
         .testTarget(name: "TensorUtilsTests", dependencies: ["TensorUtils", "Models", "Hub"], resources: [.process("Resources")]),
         .testTarget(name: "NormalizerTests", dependencies: ["Tokenizers", "Hub"]),