## v2.2.1 (2021-06-07) - Bugfix release for ARPA2 Groups - Added default Service Key to `group_iterate()` - Welcome + characters in local-part during `a2id_parse_remote()` - Install `<arpa2/group.h>` - ARPA2 Group database tooling: `a2access add|del|get member ... [identity ...] [marks ...]`