v0.22.0

(See the Changelog.md for a deeper look, I did not use PRs in this version):

Features

• Include dsc.gg in the antispam system.
• !primo, !helper and !warn Commandos are now /primo, /helper and /warn slash commands.
• Moved all the admin commands to the clankctl REST API.

Refactor

• Replace custom TS API declarations with discord-api-types.
• Wrote a class factory to instantiate all the Interaction handlers.
• Make karma stats part of the Member class.