Re-enable MacOS on Github

Author: atilaneves

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
         os:
           - ubuntu-24.04
           - windows-2022
-          #- macos-12
+          - macos-15
         dc:
           - dmd-2.111.0
           - dmd-2.099.1