Require python 3.12

Probably not strictly necessary but I don't want
to test with many versions.

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ "3.10", "3.11" ]
+        python-version: ["3.12"]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.10
+FROM python:3.12
 
 LABEL maintainer="Stéphane Bidoul"
 

pyproject.toml

@@ -20,6 +20,7 @@ dependencies = [
     "sse-starlette",
     "uvicorn",
 ]
+requires-python = "==3.12.*"
 dynamic = ["version", "description"]
 
 [project.optional-dependencies]