[caribou/ricotz/vala: 2/5] Bump vala requirement to 0.40

[Rico Tzschichholz <ricotz src gnome org>]

commit 1b8c487e0e735914ec5dacecc784a284a0f56c9d
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Jan 20 23:05:44 2021 +0100

    Bump vala requirement to 0.40

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index eb84eae..539e451 100644
--- a/configure.ac
+++ b/configure.ac
@@ -61,7 +61,7 @@ PKG_CHECK_MODULES(CARIBOU, [
 AC_SUBST(CARIBOU_CFLAGS)
 AC_SUBST(CARIBOU_LIBS)
 
-AM_PROG_VALAC([0.13])
+AM_PROG_VALAC([0.40])
 AC_SUBST(VALAC)
 AC_SUBST(VALAFLAGS)