Release of heliocats 1.2.1 for pypi

Release for Moestl et al. 2021 ICME multipoint catalog paper.

Release of heliocats 1.1.1 for pypi

release 1.1

Release of heliocats 1.1 for pypi

This is the first public heliocats release on pypi.

First heliocats release

This is the first heliocats release at the time of the submission (July 2020) of the paper Möstl et al. (2020, ApJ).