Drop Python 3.9 support

Author: tulir

.github/workflows/python-package.yml

@@ -4,17 +4,16 @@ on: [push, pull_request]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install libolm
@@ -47,8 +46,8 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: "3.12"
     - uses: isort/isort-action@master

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## v0.20.4 (unreleased)
 
+* Dropped Python 3.9 support.
 * *(client)* Changed media download methods to log requests and to raise
   exceptions on non-successful status codes.
 

setup.py

@@ -33,7 +33,7 @@
         "encryption": encryption_dependencies,
     },
     tests_require=test_dependencies,
-    python_requires="~=3.9",
+    python_requires="~=3.10",
 
     classifiers=[
         "Development Status :: 4 - Beta",