support py39

Author: Kriechi

.github/workflows/ci.yml

@@ -16,6 +16,7 @@ jobs:
         - 3.6
         - 3.7
         - 3.8
+        - 3.9
         - pypy3
 
     steps:
@@ -44,14 +45,13 @@ jobs:
         side: [client, server]
 
     steps:
-    - uses: actions/checkout@master
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
       with:
         python-version: 3.8
     - name: Install tox
       run: |
-        python -m pip install --upgrade pip
+        python -m pip install --upgrade pip setuptools
         pip install --upgrade tox
     - name: Initialize tox envs
       run: |

CHANGELOG.rst

@@ -5,7 +5,7 @@ Release History
 ---------
 
 - Prevent invalid window bit sizes.
-- Added support for Python 3.8.
+- Added support for Python 3.8 and 3.9.
 
 
 0.15.0 (2019-08-10)

setup.py

@@ -51,6 +51,7 @@
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
     ],

tox.ini

@@ -1,11 +1,12 @@
 [tox]
-envlist = py36, py37, py38, pypy3, format, mypy, lint, docs, packaging
+envlist = py36, py37, py38, py39, pypy3, format, mypy, lint, docs, packaging
 
 [gh-actions]
 python =
     3.6: py36
     3.7: py37
     3.8: py38, format, mypy, lint, docs, packaging
+    3.9: py39
     pypy3: pypy3
 
 [testenv]