Set up all supported versions of pythons.

.github/workflows/test.yml

@@ -15,19 +15,31 @@ jobs:
       - name: Set up Python 3.6
         uses: actions/setup-python@v4
         with:
-          python-version: '3.6'
+          python-version: "3.6"
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.7"
       - name: Set up Python 3.8
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: "3.8"
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.9"
       - name: Set up Python 3.10
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: "3.10"
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
       - name: Set up Python 3.12
         uses: actions/setup-python@v4
         with:
-          python-version: '3.12'
+          python-version: "3.12"
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip