Pyflwdir

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Improved
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* vectorizing of streams
* pfafstetter method improved
* remove use of pandas and geopandas to limit dependencies

New
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* new subbasins method
* features method in favor vectorize

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Improved
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* improved test coverage
* prepared release for pip

New
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Improved
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* code reformatted using black
* improved subgrid river methods

New
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* subgrid_rivlen, subgrid_rivslp methods in favor of ucat_channel (will be deprecated)

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Improved
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* improved COM upscaling

New
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Improved
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* simplified data layout based on linear downstream cell indices and a ordered sequence or down- to upstream cell indices.

New
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* hand - height above neares drain based on Nobre et al. (2016)
* floodplains - flood plain delineation based on Nardi et al. (2019)
* snap/path - methods to follow a streamline in up- or downstream direction

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New
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* suport for multiple flow direction types

Improved
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* upscale - Connecting outlets method is born