Make Python 3.9 the minimum version

3.8 is very EOL by now, let's move forward a bit...

Author: Rahix

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install dependencies, linters, doc-tools
         run: |
           python -m pip install --upgrade pip

.github/workflows/docs.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install dependencies, linters, doc-tools
         run: |
           python -m pip install --upgrade pip

Documentation/installation.rst

@@ -7,7 +7,7 @@ Prerequisites
 -------------
 tbot supports running on Linux only.  Other UNIXes might work but are not tested.
 
-tbot requires at least **Python 3.8**.  Any version older than that **will not
+tbot requires at least **Python 3.9**.  Any version older than that **will not
 work**.
 
 Installation

README.md

@@ -1,6 +1,6 @@
 <p align="center">
   <img src="Documentation/static/tbot-logo-header.png" alt="tbot" /><br />
-  <a href="https://www.python.org/"><img src="https://img.shields.io/badge/python-3.8-blue.svg" alt="Python 3.8" /></a>
+  <a href="https://www.python.org/"><img src="https://img.shields.io/badge/python-3.9-blue.svg" alt="Python 3.9" /></a>
   <a href="http://mypy-lang.org/"><img src="http://www.mypy-lang.org/static/mypy_badge.svg" alt="Checked with mypy" /></a>
   <a href="https://github.com/ambv/black"><img src="https://img.shields.io/badge/code%20style-black-000000.svg" alt="Code style: black" /></a>
   <a href="https://github.com/Rahix/tbot/actions"><img src="https://github.com/Rahix/tbot/workflows/tbot%20selftest%20CI/badge.svg" alt="tbot selftest CI" /></a>

pyproject.toml

@@ -13,7 +13,7 @@ write_to = "tbot/_version.py"
 profile = "black"
 
 [tool.mypy]
-python_version = "3.8"
+python_version = "3.9"
 mypy_path = "stubs/:./"
 warn_incomplete_stub = true
 warn_redundant_casts = true