Add Python 3.8 as supported

.drone.jsonnet

@@ -38,6 +38,7 @@ local Pipeline(py_version) = {
   Pipeline("3.5"),
   Pipeline("3.6"),
   Pipeline("3.7"),
+  Pipeline("3.8"),
   {
     kind: "pipeline",
     name: "upload release",
@@ -49,6 +50,7 @@ local Pipeline(py_version) = {
       "tests (Python 3.5)",
       "tests (Python 3.6)",
       "tests (Python 3.7)",
+      "tests (Python 3.8)",
     ],
     steps: [
       {

README.md

@@ -64,8 +64,8 @@ pytest
 
 You can use `tox` for running tests with all supported Python versions:
 ```shell
-pyenv install 3.5.6; pyenv install 3.6.7; pyenv install 3.7.1
-pyenv local 3.7.1 3.6.7 3.5.6
+pyenv install 3.5.6; pyenv install 3.6.7; pyenv install 3.7.1; pyenv install 3.8.0
+pyenv local 3.8.0 3.7.1 3.6.7 3.5.6
 pip install tox
 tox
 ```

setup.py

@@ -27,6 +27,7 @@ setup(
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         'Topic :: Software Development :: Libraries',
     ],
     description='A python library for interacting with the Apple Push Notification Service via HTTP/2 protocol'

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py35, py36, py37
+envlist = py35, py36, py37, py38
 
 [testenv]
 commands = pytest {posargs}