ci: run tests against python 3.14

Author: jorwoods

.github/workflows/run-tests.yml

@@ -13,7 +13,14 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13']
+        include: # Adding prereleases explicitly
+        - os: ubuntu-latest
+          python-version: '3.14'
+          allow-prereleases: true
+        - os: macos-latest
+          python-version: '3.14t'
+          allow-prereleases: true
 
     runs-on: ${{ matrix.os }}
 
@@ -38,6 +45,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+        allow-prereleases: ${{ matrix.allow-prereleases || false }}
 
     - name: Install dependencies
       run: |