Anti-raid levels don't by themselves do anything, but they can be
used in overrides to activate specific automod items.
Spam detection should now be more reliable and also combine further
spam messages after the initial detection into the archive.
Messages deleted by automod no longer create the normal deletion log
entry. Instead, the AUTOMOD_ACTION log entry contains the deleted
message or an archive if there are multiple (i.e. spam).
!server can now also use numbers from the invite of servers with
a vanity URL.
API calls for the invite and the REST guild endpoint are now memoized.
Since Guild.fetchAllMembers() now returns a promise, tweaked
refreshMembersIfNeeded() to not make unnecessary API calls if called
multiple times in rapid succession.
Offline member count is now derived from guild member count and
calculated online member count. The numbers might still not match the
real member counts, but at least they add up to the total member
count.
Eris 0.11.2 also made Guild.fetchAllMembers() return a promise, which
means !server will now properly wait for all members to load.
Since the command uses extra server resources for resizing the image,
I want to limit its use a bit. Might look into a per-channel or
per-guild cooldown in the future rather than per-user, but this will
work for now.
Including the dom lib doesn't make much sense since we're not in a
browser environment. While this solution isn't perfect either, I
think it's more fitting.
Since voice mutes cannot be re-applied unless the member is in voice,
we can't re-apply the voice mute automatically on join and would have
to do it later when they first join voice, which could get messy if
they were not supposed to be voice muted anymore after all (if they
e.g. don't use voice for a long time).
