Add Python 3.12 support. Fixes https://github.com/GNS3/gns3-server/issues/2273

.github/workflows/testing.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-20.04  # Downgrade Ubuntu to 20.04 to fix missing Python 3.6
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v2

setup.py

@@ -109,6 +109,7 @@ setup(
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
     ],
 )