chore: remove support for python 3.9 (BREAKING CHANGE)

Author: jcristau

pyproject.toml

@@ -10,15 +10,14 @@ readme = "README.md"
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)",
-  "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Topic :: Software Development",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
   "aiohttp[speedups]~=3.8",
   "gql[aiohttp,requests]>=4,<5",

taskcluster/kinds/docker-image/kind.yml

@@ -10,5 +10,5 @@ tasks:
     fetch: {}
     python:
         args:
-            PYTHON_VERSIONS: "3.14 3.13 3.12 3.11 3.10 3.9"
+            PYTHON_VERSIONS: "3.14 3.13 3.12 3.11 3.10"
             UV_VERSION: 0.9.18