fix warning, switch to swift 6 -- that fixes some of the sendability issues

Author: davidkoski

Tools/llm-tool/LoraCommands.swift

@@ -41,7 +41,7 @@ struct LoRAModelArguments: ParsableArguments, Sendable {
     /// This does not load the adapter weights as they may not exist yet.
     func load(
         defaultModel: String = defaultModel,
-        modelFactory: ModelFactory = LLMModelFactory.shared
+        modelFactory: any ModelFactory = LLMModelFactory.shared
     ) async throws -> (ModelContainer, ModelAdapter) {
         let modelContainer = try await args.load(
             defaultModel: defaultModel, modelFactory: modelFactory)

mlx-swift-examples.xcodeproj/project.pbxproj

@@ -2686,7 +2686,7 @@
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_STRICT_CONCURRENCY = complete;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 			};
 			name = Debug;
 		};
@@ -2746,7 +2746,7 @@
 				SDKROOT = macosx;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_STRICT_CONCURRENCY = complete;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 			};
 			name = Release;
 		};