configure: Require GTK+ 2.91.0

We don't build with earlier any longer.

diff --git a/configure.ac b/configure.ac
index 102ce53f8dd274abdff879a704ac0ac207f063c0..91fd1204066ef59b7ad81dd260d33f1b89dd65f2 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -61,7 +61,7 @@ CLUTTER_MIN_VERSION=1.3.14
 GOBJECT_INTROSPECTION_MIN_VERSION=0.6.11
 GJS_MIN_VERSION=0.7
 MUTTER_MIN_VERSION=2.91.0
-GTK_MIN_VERSION=2.90.7
+GTK_MIN_VERSION=2.91.0
 GIO_MIN_VERSION=2.25.9
 
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