Update python-app.yml

Author: tonybaloney

.github/workflows/python-app.yml

@@ -12,14 +12,19 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
-
+    name: Test ${{ matrix.os }} Python ${{ matrix.python_version }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["macos-11", ubuntu-20.04, "windows-latest"]
+        python_version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python 3.10
+    - name: Setup python
       uses: actions/setup-python@v2
       with:
-        python-version: "3.10"
+        python-version: ${{ matrix.python_version }}
+        architecture: x64
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip