update python-app.yml

Author: learnforpractice

.github/workflows/python-app.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
         os: ['windows-latest', 'ubuntu-18.04', 'macos-latest']
         # python-version: [3.9]
         # os: ['windows-latest']