Update submodules: plugins (new commits)

plugins:
    30f24d6 Chris Smith <chris@dmdirc.com>
            Rest of the plugin uses of getOptionColour.

            Gerrit: http://gerrit.dmdirc.com/3077

Change-Id: I899e056c88499d2ff72827c456372fcfc9e26863

modules/plugins

@@ -1 +1 @@
-Subproject commit 27910de71dcf2b9f591145b1ead733fad39244c5
+Subproject commit 30f24d6fddca181c472dbf68b0c1cfa963819d84