prune gcc/clang versions to be tested

Test only the oldest and latest versions of each

Author: djmdjm

.github/workflows/c-cpp.yml

@@ -33,18 +33,10 @@ jobs:
           - { target: ubuntu-22.04, config: c89 }
           - { target: ubuntu-22.04, config: clang-11 }
           - { target: ubuntu-22.04, config: clang-12-Werror }
-          - { target: ubuntu-22.04, config: clang-13 }
           - { target: ubuntu-22.04, config: clang-14 }
-          #- { target: ubuntu-22.04, config: clang-6.0 }
-          #- { target: ubuntu-22.04, config: clang-8 }
-          #- { target: ubuntu-22.04, config: clang-9 }
-          #- { target: ubuntu-22.04, config: clang-10 }
           - { target: ubuntu-22.04, config: clang-sanitize-address }
           - { target: ubuntu-22.04, config: clang-sanitize-undefined }
-          #- { target: ubuntu-22.04, config: gcc-7 }
-          #- { target: ubuntu-22.04, config: gcc-8 }
           - { target: ubuntu-22.04, config: gcc-9 }
-          - { target: ubuntu-22.04, config: gcc-10 }
           - { target: ubuntu-22.04, config: gcc-11-Werror }
           - { target: ubuntu-22.04, config: gcc-12-Werror }
           - { target: ubuntu-22.04, config: gcc-sanitize-address }
@@ -63,17 +55,8 @@ jobs:
           - { target: ubuntu-22.04, config: valgrind-4 }
           - { target: ubuntu-22.04, config: valgrind-unit }
           - { target: ubuntu-22.04, config: without-openssl }
-          - { target: ubuntu-latest, config: gcc-9 }
-          - { target: ubuntu-latest, config: gcc-10 }
-          - { target: ubuntu-latest, config: gcc-11 }
-          - { target: ubuntu-latest, config: gcc-12 }
-          - { target: ubuntu-latest, config: gcc-13 }
           - { target: ubuntu-latest, config: gcc-14 }
-          - { target: ubuntu-latest, config: clang-14 }
           - { target: ubuntu-latest, config: clang-15 }
-          - { target: ubuntu-latest, config: clang-16 }
-          - { target: ubuntu-latest, config: clang-17 }
-          - { target: ubuntu-latest, config: clang-18 }
           - { target: ubuntu-latest, config: clang-19 }
           - { target: ubuntu-latest, config: boringssl }
           - { target: ubuntu-latest, config: aws-lc }