bc represents imabritishcow’s point-five–based versioning system which, in my opinion, makes no sense, but is included anyway. Semantic versioning is used for the non-parenthesised version numbers.
The 1.3.0 update added Loyalty Card–related commands:
s!setpts sets a user’s points
s!card and s!mycard both show information about your card.
s!addpts adds points
s!enablecards and s!disablecards enable and disable cards, respectively.
Command aliases were added by Orangix—s!card and s!mycard work the same, as well as s!transfer, s!send, and s!pay.
These updates added core features. No need for a changelog, plus I'm not really sure what actually happened.
This initial version of Simple involved staff commands like setting balances along with the base which involved database software.