Update submodules: parser (new commits)

parser:
    72d7f53 Chris Smith <chris@dmdirc.com>
            Add a test for removing modes.

            Gerrit: http://gerrit.dmdirc.com/3965

Change-Id: Ibf36d8802aa71599d9947ed05ee054879926b5be

modules/parser

@@ -1 +1 @@
-Subproject commit b72a5d72e80c4b26c255c23cb0d6b9064636b668
+Subproject commit 72d7f53b35b69eed591d5d6fcdb391b6d70573ec