From aabfa009e2e0f5a6c780894e60bd0ce67365ab95 Mon Sep 17 00:00:00 2001
From: Yusuke Miyazaki <miyazaki.dev@gmail.com>
Date: Wed, 29 Dec 2021 20:48:25 +0900
Subject: [PATCH] Drop Python 3.6 support

---
 .github/workflows/tests.yml |  6 +-----
 README.md                   | 12 ++++++------
 pyproject.toml              |  2 +-
 setup.cfg                   |  6 ++----
 4 files changed, 10 insertions(+), 16 deletions(-)

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c1cece9..1410873 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,11 +18,7 @@ jobs:
           - macos-latest  # macOS-10.15
           - windows-2016
           - windows-latest  # windows-2019
-        python-version: [3.6, 3.7, 3.8, 3.9, '3.10', pypy-3.6, pypy-3.7]
-        exclude:
-          # https://github.com/actions/setup-python/issues/311
-          - platform: macos-latest
-            python-version: pypy-3.6
+        python-version: [3.7, 3.8, 3.9, '3.10', pypy-3.7]
 
     steps:
     - uses: actions/checkout@v1
diff --git a/README.md b/README.md
index cbe498d..ace6a46 100644
--- a/README.md
+++ b/README.md
@@ -231,8 +231,8 @@ _Changed in 3.0_: `pypy3` is not supported in the configuration anymore. Please
 You can also use environment variable to decide which environment to run.
 The following is an example to install different dependency based on platform.
 It will create 9 jobs when running the workflow on GitHub Actions.
-- On Python 3.6/ubuntu-latest job, tox runs `py36-linux` environment
-- On Python 3.7/ubuntu-latest job, tox runs `py37-linux` environment
+- On Python 3.8/ubuntu-latest job, tox runs `py38-linux` environment
+- On Python 3.9/ubuntu-latest job, tox runs `py39-linux` environment
 - and so on.
 
 `.github/workflows/<workflow>.yml`:
@@ -249,7 +249,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.6, 3.7, 3.8]
+        python-version: ['3.8', '3.9', '3.10']
 
     steps:
     - uses: actions/checkout@v1
@@ -270,13 +270,13 @@ jobs:
 `tox.ini`:
 ```ini
 [tox]
-envlist = py{36,37,38}-{linux,macos,windows}
+envlist = py{38,39,310}-{linux,macos,windows}
 
 [gh-actions]
 python =
-    3.6: py36
-    3.7: py37
     3.8: py38
+    3.9: py39
+    3.10: py310
 
 [gh-actions:env]
 PLATFORM =
diff --git a/pyproject.toml b/pyproject.toml
index e3da40c..a56acbf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ requires = [
 build-backend = 'setuptools.build_meta'
 
 [tool.black]
-target-version = ["py36", "py37", "py38", "py39"]
+target-version = ["py37", "py38", "py39"]
 
 [tool.coverage.paths]
 # For combining source file paths correctly
diff --git a/setup.cfg b/setup.cfg
index 76ca36c..995933b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -23,7 +23,6 @@ classifiers =
     Operating System :: OS Independent
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
@@ -40,7 +39,7 @@ packages = find:
 package_dir =
   =src
 zip_safe = True
-python_requires = >=3.6
+python_requires = >=3.7
 install_requires =
     tox >= 4.0.0a9, <5
 setup_requires =
@@ -79,11 +78,10 @@ envlist =
     black
     flake8
     mypy
-    {py36,py37,py38,py39,py310,pypy2,pypy3}-toxlatest
+    {py37,py38,py39,py310,pypy2,pypy3}-toxlatest
 
 [gh-actions]
 python =
-    3.6: py36
     3.7: py37
     3.8: py38, black, flake8
     3.9: py39, mypy