chore: include Python 3.9 in testing

Author: Midnighter

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2

setup.cfg

@@ -6,7 +6,7 @@ author = Moritz E. Beber
 author_email = [email protected]
 # Please consult https://pypi.org/classifiers/ for a full list.
 classifiers =
-    Development Status :: 2 - Pre-Alpha
+    Development Status :: 3 - Alpha
     Environment :: Web Environment
     Intended Audience :: Developers
     Intended Audience :: Information Technology

tox.ini

@@ -1,11 +1,12 @@
 [tox]
-envlist = isort, black, flake8, mypy, safety, docs, py3{6,7,8}
+envlist = isort, black, flake8, mypy, safety, docs, py3{6,7,8,9}
 
 [gh-actions]
 python =
     3.6: py36
     3.7: py37
     3.8: py38
+    3.9: py39
 
 [testenv]
 deps =