CI: test on pre-releases of 3.14

Author: bfontaine

.github/workflows/build.yml

@@ -13,20 +13,21 @@ jobs:
     strategy:
       matrix:
         # See https://github.com/actions/python-versions/releases for available versions
-        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
+        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13", "3.14" ]
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install Poetry
         run: |
           pipx install poetry
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
           cache: 'poetry'
 
       - name: Install dependencies