Test on Python 3.15

Author: kytta

.github/workflows/ci.yml

@@ -34,12 +34,14 @@ jobs:
         - "3.12"
         - "3.13"
         - "3.14"
+        - "3.15"
     steps:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
       with:
         python-version: ${{ matrix.python-version }}
+        allow-preleleases: true
     - name: Install test dependencies
       run: |
         python -m pip install --upgrade pip