Update submodules: plugins (new commits)

plugins:
    bab9c07 Greg Holmes <greg@dmdirc.com>
            Switch DCCManager to ServerCtcpEvent.

            Gerrit: http://gerrit.dmdirc.com/3499

Change-Id: Ib87c8171586c96f2a44bb13c74c1ba6cbf51e50c
Update submodules: plugins (new commits)

plugins:
    30eb994 Greg Holmes <greg@dmdirc.com>
            Maybe convert actions listening to events in script plugin.

            Gerrit: http://gerrit.dmdirc.com/3500

Change-Id: I00214d7c1eaabb9d203b6d83ecd2a509a78e401e
Update submodules: plugins (new commits)

plugins:
    14fe3cb Greg Holmes <greg@dmdirc.com>
            Remove another singleton.

            Gerrit: http://gerrit.dmdirc.com/3501

Change-Id: If1a72555e641de09e348a97f72dbd3aa8670547b