[releng] Update glibmm limits

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 9fac0534eb13b9a92ab6221294d314968bd89092
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sat Dec 30 19:03:03 2017 -0600

    Update glibmm limits
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792047

 tools/smoketesting/tarball-conversion.config |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tools/smoketesting/tarball-conversion.config b/tools/smoketesting/tarball-conversion.config
index ca55b44..1436dde 100644
--- a/tools/smoketesting/tarball-conversion.config
+++ b/tools/smoketesting/tarball-conversion.config
@@ -186,7 +186,7 @@
     <package name="gtksourceview"               set="core"/>
     <package name="gjs"                         set="core"/>
     <package name="glib"                        set="core"/>
-    <package name="glibmm-2.4"                  set="core" limit="2.51" module="glibmm"/>
+    <package name="glibmm-2.4"                  set="core" limit="2.55" module="glibmm"/>
     <package name="glibmm"                      set="core"/>
     <package name="gmime3"                      set="core" module="gmime"/>
     <package name="gmime"                       set="core" limit="2.99"/>