[gimp-macos-build/wip/lukaso/tests] Update xcode version

[Jehan <jehanp src gnome org>]

commit 4324cda3c687f851fdfcbbc6db624bf5dfc56722
Author: Lukas Oberhuber <lukaso gmail com>
Date:   Mon Sep 27 15:17:37 2021 +0000

    Update xcode version

 .circleci/config.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 562ad1d..14db35c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   build-gimp-2-10:
     macos:
-        xcode: "10.1.0"
+        xcode: "13.0.0"
 
     steps:
         - checkout