Update CI and setup to support Python 3.12 only

Author: msmans

.github/workflows/ci.yml

@@ -2,14 +2,15 @@ name: CI
 
 on:
   push:
+    branches: ["main"]
   pull_request:
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.12"]
 
     steps:
       - uses: actions/checkout@v4

setup.py

@@ -28,5 +28,5 @@ def read_requirements():
         "License :: OSI Approved :: BSD License",
         "Operating System :: OS Independent",
     ],
-    python_requires=">=3.10",
+    python_requires=">=3.12",
 )