Add python 3.12.

Author: janiversen

.github/workflows/ci.yml

@@ -33,6 +33,7 @@ jobs:
           - version: '3.9'
           - version: '3.10'
           - version: '3.11'
+          - version: '3.12'
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
@@ -62,6 +63,7 @@ jobs:
           - version: '3.9'
           - version: '3.10'
           - version: '3.11'
+          - version: '3.12'
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4