[geary: 1/2] Update required Vala version.

[Michael Gratton <mjog src gnome org>]

commit 6a88b8121e8e2041236cb3a0e70e1dc4f45035ec
Author: Guillaume Ayoub <guillaume ayoub kozea fr>
Date:   Wed May 6 11:29:31 2020 +0000

    Update required Vala version.
    
    Vala 0.46.2+ is needed to allow overridden virtual interfaces.
    
    Fix #825.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index e135e562d..3d7f77cff 100644
--- a/meson.build
+++ b/meson.build
@@ -50,7 +50,7 @@ valac = meson.get_compiler('vala')
 # Required libraries and other dependencies
 #
 
-target_vala = '0.42'
+target_vala = '0.46.2'
 target_glib = '2.60.4'
 target_gtk = '3.24.7'
 target_webkit = '2.26'