Updated package OS setup

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,19 @@
+### Summary
+<!-- Please provide a brief summary of your changes. -->
+
+### Changes Made
+<!-- List the specific changes you've made in this PR. -->
+
+### Rationale
+<!-- Why are these changes needed? If it's a new feature, please describe the use case. -->
+
+### Testing Performed
+<!-- What tests did you run to verify your changes? Please list any new test cases added. -->
+
+### Related Issue
+<!-- If this PR is related to an existing issue, please link it here. -->
+
+### Checklist
+- [ ] Code follows project formatting standards (2 spaces).
+- [ ] Tests pass locally (`swift test`).
+- [ ] Documentation updated (if applicable).

CONTRIBUTING.md

@@ -0,0 +1,25 @@
+# Contributing to AsyncTimeSequences
+
+Thank you for your interest in contributing to AsyncTimeSequences! We welcome contributions of all kinds, including new features, bug fixes, and improvements to documentation.
+
+## How to Contribute
+
+1.  **Fork the Repository**: Create your own copy of the repository on GitHub.
+2.  **Clone Locally**: `git clone https://github.com/Henryforce/AsyncTimeSequences.git`
+3.  **Create a Branch**: Use a descriptive name for your branch.
+4.  **Make Changes**: Ensure your code follows the project's formatting standards.
+5.  **Write Tests**: If you're adding a new feature or fixing a bug, please include tests to verify your changes.
+6.  **Run Tests Locally**: Ensure all tests pass before submitting your PR.
+7.  **Submit a Pull Request**: Provide a clear description of your changes and why they are needed.
+
+## Code Style & Formatting
+
+Please run the following command on your changes before submitting:
+
+```bash
+swift format . --recursive --in-place
+```
+
+## License
+
+By contributing to AsyncTimeSequences, you agree that your contributions will be licensed under the project's [License](LICENSE).

Package.swift

@@ -5,7 +5,7 @@ import PackageDescription
 
 let package = Package(
   name: "AsyncTimeSequences",
-  platforms: [.iOS(.v13), .macOS(.v13), .watchOS(.v6), .tvOS(.v13)],
+  platforms: [.iOS(.v13), .macOS(.v13), .watchOS(.v6), .tvOS(.v13), .visionOS(.v1)],
   products: [
     // Products define the executables and libraries a package produces, and make them visible to other packages.
     .library(

Sources/AsyncTimeSequences/AsyncScheduler/AsyncScheduler.swift

@@ -68,7 +68,11 @@ public actor MainAsyncScheduler: AsyncScheduler {
     after: TimeInterval
   ) -> Task<Void, Never> {
     return Task {
-      try? await Task.sleep(for: .seconds(after))
+      if #available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *) {
+        try? await Task.sleep(for: .seconds(after))
+      } else {
+        try? await Task.sleep(nanoseconds: UInt64(after * 1_000_000_000))
+      }
 
       completedElementIds.insert(currentId)
       if Task.isCancelled {