Don't run CI on macOS < 5.12

Author: oalders

.github/workflows/build-and-test.yml

@@ -108,8 +108,6 @@ jobs:
     strategy:
       matrix:
         perl-version:
-          - "5.8"
-          - "5.10"
           - "5.12"
           - "5.14"
           - "5.16"