Drop Python 3.6 support

.github/workflows/build.yml

@@ -20,7 +20,6 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.6"
           - "3.7"
           - "3.8"
           - "3.9"

CHANGES.rst

@@ -5,7 +5,7 @@ Changelog
 0.49 (unreleased)
 -----------------
 
-- Nothing changed yet.
+- Drop Python 3.6 support.
 
 
 0.48 (2022-03-13)

appveyor.yml

@@ -4,7 +4,6 @@ environment:
   matrix:
     # https://www.appveyor.com/docs/installed-software#python lists available
     # versions
-    - PYTHON: "C:\\Python36"
     - PYTHON: "C:\\Python37"
     - PYTHON: "C:\\Python38"
     - PYTHON: "C:\\Python39"

setup.py

@@ -45,7 +45,6 @@ setup(
         'Programming Language :: Python',
         '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',
@@ -57,7 +56,7 @@ setup(
 
     py_modules=['check_manifest'],
     zip_safe=False,
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     install_requires=[
         'build>=0.1',
         'setuptools',

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py36,py37,py38,py39,py310,pypy3,flake8
+    py37,py38,py39,py310,pypy3,flake8
 
 [testenv]
 passenv = LANG LC_CTYPE LC_ALL MSYSTEM