configure.ac: Update version to 1.2.91
diff --git a/configure.ac b/configure.ac
index 8403c11..7c2da44 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 m4_define([weston_major_version], [1])
 m4_define([weston_minor_version], [2])
-m4_define([weston_micro_version], [90])
+m4_define([weston_micro_version], [91])
 m4_define([weston_version],
           [weston_major_version.weston_minor_version.weston_micro_version])
 
@@ -55,7 +55,7 @@
 
 AC_CHECK_FUNCS([mkostemp strchrnul initgroups])
 
-COMPOSITOR_MODULES="wayland-server >= 1.2.90 pixman-1"
+COMPOSITOR_MODULES="wayland-server >= 1.2.91 pixman-1"
 
 AC_ARG_ENABLE(egl, [  --disable-egl],,
               enable_egl=yes)