Bring Python current in GHA (#300)

Author: gliptak

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11"]
+        python-version: ["3.13"]
         os: ["ubuntu-latest"]
     runs-on: ${{ matrix.os }}
     steps:

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
     runs-on: ${{ matrix.os }}
     steps:

README.md

@@ -8,7 +8,7 @@ uv tool install ghstack
 
 ghstack is tested with 
 [several different Python versions](https://github.com/ezyang/ghstack/blob/master/.github/workflows/test.yml#L13). 
-It requires at least Python 3.8.1.
+It requires at least Python 3.9.1.
 
 ## How to setup
 

mypy.ini

@@ -1,5 +1,5 @@
 [mypy]
-python_version = 3.8
+python_version = 3.9
 strict_optional = True
 show_column_numbers = True
 show_error_codes = True

pyproject.toml

@@ -3,7 +3,7 @@ authors = [
     {name = "Edward Z. Yang", email = "[email protected]"},
 ]
 license = {text = "MIT"}
-requires-python = "<4.0.0,>=3.8.1"
+requires-python = "<4.0.0,>=3.9.1"
 dependencies = [
     "aiohttp<4,>=3",
     "importlib-metadata>=1.4; python_version < \"3.8\"",