This is just the scaffolding for it and doesn't implement any actual commands.
Testing Done:
Sent some `CTCP VERSION`'s to an IRCv3 account. Also manually sent `CTCP VERSION`'s to users and channel via temporary code in when the connection was fully established.
Reviewed at https://reviews.imfreedom.org/r/2854/
# UPDATING VERSION NUMBERS FOR RELEASES
#
# The version number is:
# <major>.<minor>.<micro><extra>
#
# micro += 1
#
# If any functions have been added to libpurple, Pidgin, or Finch:
# micro = 0
# minor += 1
#
# If backwards compatibility has been broken in libpurple, Pidgin, or Finch:
# micro = 0
# minor = 0
# major += 1
# purple_soversion += 1
#
# extra should be similar to one of the following: