update CI to py39 and torch251

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: [3.8]
+        python-version: [3.9]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
@@ -38,7 +38,7 @@ jobs:
     needs: lint
     strategy:
       matrix:
-        python-version: [3.8]
+        python-version: [3.9]
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}
@@ -51,7 +51,7 @@ jobs:
           sudo apt-get update
           sudo apt-get install gcc-8 g++-8 ninja-build
           python -m pip install --upgrade pip wheel setuptools
-          pip install torch==1.11.0+cpu -f https://download.pytorch.org/whl/torch_stable.html
+          pip install torch==2.5.1+cpu -f https://download.pytorch.org/whl/torch_stable.html
           pip install .[test]
           pip install coveralls
           pip freeze