Drop support for EOL Python 3.9

Author: hugovk

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
+        python: ['3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
 
     steps:
       - name: Checkout
@@ -35,7 +35,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
+        python: ['3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
         check_formatting: ['0']
         extra_name: ['']
         include:
@@ -72,7 +72,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
+        python: ['3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
     steps:
       - name: Checkout
         uses: actions/checkout@v6

pyproject.toml

@@ -26,7 +26,7 @@ classifiers = [
     "Intended Audience :: Developers",
     "Development Status :: 5 - Production/Stable",
 ]
-requires-python = ">= 3.9"
+requires-python = ">= 3.10"
 dynamic = ["version"]
 
 [project.urls]