Fix macOS x64 runners (#13)

Author: christiangnrd

.github/workflows/Test.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         version: ['lts', '1.11', 'nightly']
-        os: [ubuntu-latest, macOS-latest, windows-latest]
+        os: [ubuntu-latest, macOS-13, windows-latest]
         arch: [x64]
         include:
           - version: 'lts'