migrated to python 3.9 as minimum version

.github/workflows/pre-commit-autoupdate.yml

@@ -12,10 +12,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4.1.1
 
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v4.7.1
         with:
-          python-version: 3.8
+          python-version: 3.9
 
       - name: Install system deps
         shell: bash

.github/workflows/release.yml

@@ -12,10 +12,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4.1.1
 
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v4.7.1
         with:
-          python-version: 3.8
+          python-version: 3.9
 
       - name: Install system deps
         shell: bash

.readthedocs.yml

@@ -3,7 +3,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.8"
+    python: "3.9"
 
 formats: all
 

noxfile.py

@@ -5,7 +5,7 @@
 from nox_poetry import Session, session
 
 nox.options.sessions = ["tests", "mypy"]
-python_versions = ["3.8", "3.9", "3.10", "3.11"]
+python_versions = ["3.9", "3.10", "3.11"]
 
 
 @session(python=python_versions)