Update submodules: plugins (new commits)

plugins:
    3140d86 Chris Smith <chris@dmdirc.com>
            DI more things.

            Gerrit: http://gerrit.dmdirc.com/2922

Change-Id: I5e5d84880ea16b88289c88be4117c2d866783e26

modules/plugins

@@ -1 +1 @@
-Subproject commit 1739163552e7717ba342a9211ca538190e86be44
+Subproject commit 3140d868123755d29de9f18a8b75bf8b8122f573