load_ncaa_softball_groups(), load_ncaa_softball_group_seasons(),
load_ncaa_softball_group_aliases() and
load_ncaa_softball_team_group_seasons() — season-by-season division and
conference reference tables from the ncaa_softball_groups
sportsdataverse-data release: each group's name and parent as of every
season, every source's ids and names for it, and each team's division and
conference by season (1982+).