update XCode.

build works for me on XCode 12.5.1, macOS 11.6.4

Author: elelay

.circleci/config.yml

@@ -3,7 +3,7 @@ version: 2.1
 jobs:
   build-and-bundle:
     macos:
-      xcode: "12.5.1"
+      xcode: "13.2.1"
     shell: /bin/bash --login -o pipefail
     steps:
       - checkout