23.3.0

Added

• Async method Container.aget(). This was necessary for generator-based cleanups. It works with sync factories too, so you can use it universally in async code.
• Async method ServicePing.aping(). It works with sync factories and pings too, so you can use it universally in async code. #4

Changed

• Switched the cleanup mechanism from passing a function to allowing the factory to be a generator that yields the resource and can clean up after the yield. Just like Pytest fixtures. #3