Only check composer dependencies on PHP 8.3+

Author: Ocramius

.github/workflows/continuous-integration.yml

@@ -98,8 +98,6 @@ jobs:
         dependencies:
           - "locked"
         php-version:
-          - "8.1"
-          - "8.2"
           - "8.3"
         operating-system:
           - "ubuntu-latest"