Move to swift 6.2

Author: erikbasargin

Package.swift

@@ -1,12 +1,12 @@
-// swift-tools-version: 6.1
+// swift-tools-version: 6.2
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "async-swiftly",
     platforms: [
-        .macOS(.v15),
+        .macOS(.v26),
     ],
     products: [
         .library(

Sources/AsyncSwiftly/TestingTaskGroup.swift

@@ -103,8 +103,7 @@ public struct TestingTaskGroup<ObservationElement: Sendable>: ~Copyable {
     public mutating func addTask(at rawStep: Int, operation: sending @escaping @isolated(any) () async -> Void) {
         let instant = Clock.Instant(when: .step(rawStep))
         let executor = OperationExecutor(instant: instant, queue: queue)
-        
-        group.addTask { [queue] in
+        group.addImmediateTask { [queue] in
             await withTaskExecutorPreference(executor, operation: operation)
             queue.markAsReadyToComplete(instant)
         }