python 3.10 on ci

Author: penguinolog

.github/workflows/pythonpackage.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.8'
+          python-version: '3.7'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -81,8 +81,8 @@ jobs:
     strategy:
       max-parallel: 6
       matrix:
-        os: [ubuntu-latest, windows-latest]
-        python-version: [3.7, 3.8, 3.9]
+        os: ["ubuntu-latest", "windows-latest"]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
       - uses: actions/checkout@v2