Test on Python 3.9

.travis.yml

@@ -7,6 +7,7 @@ jobs:
     - python: "3.7"
     - python: "3.8"
       env: "CC_TEST_REPORTER_ID=2a411f596959fc32f5d73f3ba7cef8cc4d5733299d742dbfc97fd6c190b9010c"
+    - python: "3.9"
 cache: pip
 git:
   depth: false

Jenkinsfile

@@ -1,4 +1,5 @@
 def pys = [
+    [name: 'Python 3.9', docker:'python:3.9-buster', tox:'py39', main: false],
     [name: 'Python 3.8', docker:'python:3.8-buster', tox:'py38,flake8', main: true],
     [name: 'Python 3.7', docker:'python:3.7-buster', tox:'py37', main: false],
     [name: 'Python 3.6', docker:'python:3.6-buster', tox:'py36', main: false],

setup.cfg

@@ -22,6 +22,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
     Topic :: Internet :: WWW/HTTP
     Topic :: Multimedia :: Graphics
 keywords = comic,webcomic,downloader,archiver,crawler

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py35, py36, py37, py38, flake8
+envlist = py35, py36, py37, py38, py39, flake8
 
 [testenv]
 commands =