Merge pull request #1411 from hramezani/python39

Add Python3.9 support.

Author: matthiask

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       max-parallel: 5
       matrix:
-        python-version: ['3.6', '3.7', '3.8']
+        python-version: ['3.6', '3.7', '3.8', '3.9']
 
     services:
       mariadb:
@@ -78,7 +78,7 @@ jobs:
       fail-fast: false
       max-parallel: 5
       matrix:
-        python-version: ['3.6', '3.7', '3.8']
+        python-version: ['3.6', '3.7', '3.8', '3.9']
 
     services:
       postgres:
@@ -146,7 +146,7 @@ jobs:
       fail-fast: false
       max-parallel: 5
       matrix:
-        python-version: ['3.6', '3.7', '3.8']
+        python-version: ['3.6', '3.7', '3.8', '3.9']
 
     steps:
     - uses: actions/checkout@v2

README.rst

@@ -14,6 +14,14 @@ Django Debug Toolbar
    :target: https://codecov.io/gh/jazzband/django-debug-toolbar
    :alt: Test coverage status
 
+.. image:: https://img.shields.io/pypi/pyversions/django-debug-toolbar
+   :target: https://pypi.python.org/pypi/django-debug-toolbar
+   :alt: Supported Python versions
+
+.. image:: https://img.shields.io/pypi/djversions/django-debug-toolbar
+   :target: https://pypi.org/project/django-debug-toolbar
+   :alt: Supported Django versions
+
 The Django Debug Toolbar is a configurable set of panels that display various
 debug information about the current request/response and when clicked, display
 more details about the panel's content.

setup.cfg

@@ -25,6 +25,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
     Topic :: Software Development :: Libraries :: Python Modules
 
 [options]

tox.ini

@@ -3,10 +3,10 @@ envlist =
     docs
     style
     readme
-    py{36,37,38}-dj22-sqlite
-    py{36,37,38}-dj{30,31}-sqlite
-    py{36,37,38}-djmaster-sqlite
-    py{37,38}-dj{22,30,31}-{postgresql,mysql}
+    py{36,37,38,39}-dj22-sqlite
+    py{36,37,38,39}-dj{30,31}-sqlite
+    py{36,37,38,39}-djmaster-sqlite
+    py{37,38,39}-dj{22,30,31}-{postgresql,mysql}
 
 [testenv]
 deps =
@@ -63,6 +63,7 @@ python =
     3.6: py36
     3.7: py37
     3.8: py38
+    3.9: py39
 
 [gh-actions:env]
 DB_BACKEND =