Drop Python 3.9 support

Author: mschwager

.github/workflows/ci.yml

@@ -10,18 +10,17 @@ jobs:
           - macos-latest
           - windows-latest
         python-version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
-          - "3.14-dev"
+          - "3.14"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install Poetry
         run: pipx install poetry
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
           cache: "poetry"

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Use `re` submodules instead of `sre_parse` and `sre_constants` ([#61](https://github.com/dlint-py/dlint/issues/61))
 
+### Removed
+
+- Support for Python 3.9
+
 ## [0.16.0] - 2024-10-31
 
 ### Added

pyproject.toml

@@ -14,7 +14,6 @@ classifiers = [
     'Operating System :: MacOS :: MacOS X',
     'Operating System :: Microsoft :: Windows',
     'Operating System :: POSIX',
-    'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',
     'Programming Language :: Python :: 3.12',