fix: Empty user list for updating usergroup users sets usergroup as having no members#1574

vegeris merged 3 commits intoslackapi:mainslackapi/java-slack-sdk:mainfrom

rozza-sb:fix/empty_user_list_for_updating_usergroup_users_sets_group_as_having_no_membersrozza-sb/java-slack-sdk:fix/empty_user_list_for_updating_usergroup_users_sets_group_as_having_no_membersCopy head branch name to clipboard