chore: only support python 3.9+

Author: JohannesRudolph

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
       GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}