[gnome-build-meta] sdk/vala-tarball.bst: Update to version 0.36.20 (latest 0.36.x LTS release)

[Rico Tzschichholz <ricotz src gnome org>]

commit 010ec4d06df3e746024d2888c86cc3e7fe6e08a1
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Oct 4 18:48:55 2019 +0200

    sdk/vala-tarball.bst: Update to version 0.36.20 (latest 0.36.x LTS release)

 elements/sdk/vala-tarball.bst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/elements/sdk/vala-tarball.bst b/elements/sdk/vala-tarball.bst
index 55ed77f5..e7803e42 100644
--- a/elements/sdk/vala-tarball.bst
+++ b/elements/sdk/vala-tarball.bst
@@ -1,7 +1,7 @@
 kind: autotools
 sources:
 - kind: tar
-  url: gnome_downloads:vala/0.36/vala-0.36.18.tar.xz
+  url: gnome_downloads:vala/0.36/vala-0.36.20.tar.xz
 build-depends:
 - freedesktop-sdk.bst:components/bison.bst
 - freedesktop-sdk.bst:components/flex.bst