Allow python 3.12 (#21)

* Allow python 3.12

* Test 3.12

Author: jakecyr

.github/workflows/test-application.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}