feat: drop Python 3.9 support

Agent-Logs-Url: https://github.com/microsoftgraph/msgraph-beta-sdk-python/sessions/24183764-30f8-4558-963c-7d67ccde60b3

Co-authored-by: ramsessanchez <63934382+ramsessanchez@users.noreply.github.com>

Author: Copilot

.devcontainer/devcontainer.json

@@ -3,7 +3,6 @@
 {
     "name": "Python 3",
     // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-    // "image": "mcr.microsoft.com/devcontainers/python:3.9-bookworm",
     // "image": "mcr.microsoft.com/devcontainers/python:3.10-bookworm",
     // "image": "mcr.microsoft.com/devcontainers/python:3.11-bookworm",
     // "image": "mcr.microsoft.com/devcontainers/python:3.12-bookworm",

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps: 
       - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}

pyproject.toml

@@ -19,14 +19,13 @@ dependencies = [
     "msgraph_core >=1.3.1"
 
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = "MIT"
 license-files = ["LICENSE"]
 readme = "README.md"
 keywords = ["msgraph", "openAPI", "Microsoft", "Graph", "beta"]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",