Added 13.4.1

Author: bok-

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: macos-12.0
     strategy:
       matrix:
-        xcode: [ "13.1", "13.2.1", "13.3.1" ]
+        xcode: [ "13.1", "13.2.1", "13.3.1", "13.4.1" ]
 
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer