gems: update async requirement from ~> 1.31.0 to >= 1.31, < 2.29

[dependabot]

Updates the requirements on async to permit the latest version.

Changelog

Sourced from async's changelog.

v2.28.1

• Fix race condition between Async::Barrier#stop and finish signalling.

v2.28.0

• Use Traces.current_context and Traces.with_context for better integration with OpenTelemetry.

v2.27.4

• Suppress excessive warning in Async::Scheduler#async.

v2.27.3

• Ensure trace attributes are strings, fixes integration with OpenTelemetry.

v2.27.2

• Fix context/index.yaml schema.

v2.27.1

• Updated documentation and agent context.

v2.27.0

• Async::Task#stop supports an optional cause: argument (that defaults to $!), which allows you to specify the cause (exception) for stopping the task.
• Add thread-safety agent context.

v2.26.0

• Async::Notification#signal now returns true if a task was signaled, false otherwise, providing better feedback for notification operations.
• require "async/limited_queue" is required to use Async::LimitedQueue without a deprecation warning. Async::LimitedQueue is not deprecated, but it's usage via async/queue is deprecated.
• Async::Task#sleep is deprecated with no replacement.
• Async::Task.yield is deprecated with no replacement.
• Async::Scheduler#async is deprecated, use Async{}, Sync{} or Async::Task#async instead.
• Agent context is now available, via the agent-context gem.

Async::Barrier Improvements

Async::Barrier now provides more flexible and predictable behavior for waiting on task completion:

• Completion-order waiting: barrier.wait now processes tasks in the order they complete rather than the order they were created. This provides more predictable behavior when tasks have different execution times.
• Block-based waiting: barrier.wait now accepts an optional block that yields each task as it completes, allowing for custom handling of individual tasks:

barrier = Async::Barrier.new
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Commits

• 6cece07 Bump patch version.
• 35ef83e Fix race between stop and task exiting. (#414)
• 998288e Bump minor version.
• 3ca3c46 Modernize code.
• 07d5fed Update release notes.
• 9e83acd Slightly more elaborate trace provider test.
• 1363629 Better support for OpenTelemetry.
• 185cd48 Bump patch version.
• af335ee Surpress excessive warning in Scheduler#async. Fixes #410.
• e6d6f94 Bump patch version.
• Additional commits viewable in compare view

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