Merge pull request #341 from cocur/github-macos-13

ci: Run tests on Mac OS 13

Author: florianeckerstorfer

Diff for: .github/workflows/unit.yml

@@ -10,7 +10,7 @@ jobs:
       matrix:
         include:
           - php: "8.0"
-            os: macos-11
+            os: macos-13
           - php: "8.0"
             mode: high-deps
             os: ubuntu-20.04