0.3.23

Added

• ArrowTableHandle stream member to store the BatchFileReader backend
• ArrowTableHandle options argument to pass in IpcReadOptions
• pod5::default_memory_pool function which selects an appropriate memory pool even on large page systems.

Changed

• Refactored Multi-threading in DatasetReader to prevent too many open files errors
• Updated dependency to pyarrow~=18.0.0 for python>=3.9
• Relaxed h5py python dependency
• Removed use of python build when building wheel in cmake.