TEST,CI: Avoid hangs on py37, exclude gennb script from cov report

See merge request fsl/funpack!89

BF: Hierarchy encoding node IDs are not all sequential

See merge request fsl/funpack!88

option. Adjustments to other tests r.e. hierarchy changes

automatcially convert codings to node IDs

bit hacky, but making it cleaner would require more widespread changes

nnodes). Adjust Hierarchy class so it does not make this assumption.

DOC: Changelog

See merge request fsl/funpack!87

Rf/commanmd name

See merge request fsl/funpack!86

Mnt/py310

See merge request fsl/funpack!85

ENH: New --remove_duplicates cli option

See merge request fsl/funpack!84