shift to newer python versions

Author: bhaller

.github/workflows/tests.yml

@@ -50,13 +50,13 @@ jobs:
         include:
           # Ubuntu with the oldest supported GCC
           # BCH 2/12/2025: Ubuntu 22.04 is being discontinued, shifting forward
-          - { os: ubuntu-22.04, gcc: 9, python: 3.9 }
-          - { os: ubuntu-24.04, gcc: 12, python: 3.12 }
+          - { os: ubuntu-22.04, gcc: 9, python: 3.11 }
+          - { os: ubuntu-24.04, gcc: 12, python: 3.14 }
           # macOS, oldest supported version
           # (macos-10.15, macos-11, macos-12, and macos-13 were removed by GitHub)
-          - { os: macos-14, python: 3.9 }
+          - { os: macos-14, python: 3.11 }
           # macOS, newest supported version
-          - { os: macos-26, python: 3.13 }
+          - { os: macos-26, python: 3.14 }
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -131,8 +131,8 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { sys: mingw64, env: x86_64, python: 3.9 }
-          - { sys: ucrt64, env: ucrt-x86_64, python: 3.9 }
+          - { sys: mingw64, env: x86_64, python: 3.11 }
+          - { sys: ucrt64, env: ucrt-x86_64, python: 3.11 }
     defaults:
       run:
         shell: msys2 {0}