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* The `segmentation_map` argument of `sep.extract()` will now accept
either an array or boolean. If an existing segmentation map is passed,
the object detection stage is skipped, and sources will be individually
analysed according to the provided map. This change is
backwards-compatible with respect to the Python module.
Please note that as no deblending is performed, the calculated
thresholds (and any dependent parameters) may not be the same as
originally derived.
* Use 64-bit integers throughout, to fix memory addressing with large
arrays
([122](https://github.com/kbarbary/sep/issues/122 "Original issue"),
inspired by [Gabe Brammer's fork](https://github.com/gbrammer/sep)
with additional fixes).