Async Property Decorator

The `async-property` library provides Python decorators (`@async_property`, `@async_cached_property`) that enable defining asynchronous properties in classes. It allows getter methods to be coroutines, which can then be awaited when accessed. It also includes `AwaitLoader` for concurrently loading multiple cached async properties. The current version is 0.2.2, with a release cadence that appears maintenance-driven, having had releases in 2019 and 2023.