Test on Python 3.9, make it officially supported

Author: Greg Dubicki

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       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.md

@@ -15,7 +15,7 @@ PuppetDB.
 
 * PuppetDB 3.0 or newer
   * (For support of older PuppetDB versions please check versions < 0.2.0)
-* Python 3.6/3.7/3.8
+* Python 3.6/3.7/3.8/3.9
 
 ## Installation
 

setup.py

@@ -67,6 +67,7 @@ def run_tests(self):
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Topic :: Software Development :: Libraries'
     ],
 )

tox.ini

@@ -1,10 +1,10 @@
 [tox]
-envlist = py{36,37,38}
+envlist = py{36,37,38,39}
 
 [testenv]
 deps=
     -rrequirements-test.txt
     bandit
 commands=
     py.test --cov=pypuppetdb --pep8 -v
-    py{36,37,38}: bandit -r pypuppetdb
+    py{36,37,38,39}: bandit -r pypuppetdb