Update submodules: plugins (new commits)

plugins:
    5956243 Greg Holmes <greg@dmdirc.com>
            Use ColourManagerFactory

            Depends-On: I6ef45d10a4fe862854702eee671114ee09f01d4d
            Gerrit: http://gerrit.dmdirc.com/3867

Change-Id: Ifd3032f684bb064b393172991f822a6c0c01722a

modules/plugins

@@ -1 +1 @@
-Subproject commit 8cc02bbfff248d97050834edeaa6fdd25fc78a72
+Subproject commit 5956243fc5cf5df772babee36c3141baad1b7672