Release v4.0.4

What's Changed

marEx detect checkpointing now more generalised, but still requires compute() on thresholds due to dask-zarr bug. (6ae350a)
Fixes the detrend_fixed_baseline with checkpoints. The dask-zarr bug came back with the thresholds; ultimately checkpoints is most useful for the shifting baseline anyways. (d097764)

pip install marEx==4.0.4

Full Changelog: v4.0.3...v4.0.4