Update submodules: plugins (new commits)

plugins:
    e9fcd57 Chris Smith <chris@dmdirc.com>
            Use some more events.

            Remove some deprecated methods in ChannelFrame.

            Gerrit: http://gerrit.dmdirc.com/3249

Change-Id: I93c37b6ab1092ae5a2d4f634e2470817f7cacc26

modules/plugins

@@ -1 +1 @@
-Subproject commit f4a1b9386f64c2ea95cb8556a0795755a9a8b23e
+Subproject commit e9fcd5705842405f254ea956a9f68ad5ab75ff22