ci: Add Python 3.14 and wxPython 4.2.2 tests (#1477)

Regarding unit tests, the idea is to test:
 * The oldest supported Python (to check for regressions)
 * The newest (to check current code feasibility)
 * An experimental/development version (to check future compatibility)
No real need to test in between, since those three should cover every case.

.github/workflows/test.yml

@@ -9,20 +9,21 @@ on:
 jobs:
   functional_test:
     name: Functional testing with Python ${{ matrix.python-version }}
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.11", "3.13"]
         include:
           - python-version: "3.8"
-            wxpython-wheel: "ubuntu-22.04/wxPython-4.2.1-cp38-cp38-linux_x86_64.whl"
-          - python-version: "3.9"
-            wxpython-wheel: "ubuntu-22.04/wxPython-4.2.1-cp39-cp39-linux_x86_64.whl"
-          - python-version: "3.10"
-            wxpython-wheel: "ubuntu-22.04/wxPython-4.2.1-cp310-cp310-linux_x86_64.whl"
+            os: "ubuntu-20.04"
+            wxpython-wheel: "ubuntu-20.04/wxPython-4.2.0-cp38-cp38-linux_x86_64.whl"
           - python-version: "3.11"
+            os: "ubuntu-22.04"
             wxpython-wheel: "ubuntu-22.04/wxPython-4.2.1-cp311-cp311-linux_x86_64.whl"
+          - python-version: "3.13"
+            os: "ubuntu-24.04"
+            wxpython-wheel: "ubuntu-24.04/wxPython-4.2.2-cp313-cp313-linux_x86_64.whl"
 
     steps:
       - uses: actions/checkout@v4
@@ -56,7 +57,7 @@ jobs:
       fail-fast: false
       matrix:
         # Unit testing uses functions not available on Python < 3.11
-        python-version: ["3.11", "3.12", "3.13"]
+        python-version: ["3.11", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v4