Add Python 3.12 to test matrix (#728)

Author: edgarrmondragon

.github/workflows/tests.yml

@@ -33,7 +33,7 @@ jobs:
     strategy:
       matrix:
         os: [Ubuntu, MacOS, Windows]
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11", "3.12"]
     defaults:
       run:
         shell: bash
@@ -45,6 +45,7 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
 
       - name: Get full Python version
         id: full-python-version