use Python 3.10

Author: MarshalX

.github/workflows/build.yml

@@ -21,9 +21,9 @@ jobs:
     - name: Setup Python.
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: 3.10
 
     - name: Build.
       run: |
-        sudo apt install -y python3.9-dev
+        sudo apt install -y python3.10-dev
         python setup.py build