Remove python 2.7, 3.6 compatibility

Author: HardNorth

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 119

.github/workflows/tests.yml

@@ -31,10 +31,10 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '2.7', '3.6', '3.7', '3.8', '3.9', '3.10' ]
+        python-version: [ '3.7', '3.8', '3.9', '3.10', '3.11' ]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -53,7 +53,7 @@ jobs:
         run: tox
 
       - name: Upload coverage to Codecov
-        if: matrix.python-version == 3.6 && success()
+        if: matrix.python-version == 3.7 && success()
         uses: codecov/codecov-action@v3
         with:
           files: coverage.xml

setup.py

@@ -4,7 +4,7 @@
 
 from setuptools import setup, find_packages
 
-__version__ = '5.3.6'
+__version__ = '5.4.0'
 
 TYPE_STUBS = ['*.pyi']
 

tox.ini

@@ -2,12 +2,11 @@
 isolated_build = True
 envlist =
     pep
-    py27
-    py36
     py37
     py38
     py39
     py310
+    py311
 
 [testenv]
 deps =
@@ -36,10 +35,8 @@ deps =
 
 [gh-actions]
 python =
-    2.7: py27
-    3.5: py35
-    3.6: pep, py36
-    3.7: py37
+    3.7: pep, py37
     3.8: py38
     3.9: py39
     3.10: py310
+    3.11: py311