Mark support for Python 3.8 & 3.9 and add to testing matrix

.github/workflows/ci.yml

@@ -1,16 +1,18 @@
 ---
 name: build
-on: push
+on: [push, pull_request]
 jobs:
   tox:
     runs-on: ubuntu-18.04
     strategy:
       fail-fast: false
       matrix:
         python:
-          - py27
-          - py36
-          - py37
+          - '2.7'
+          - '3.6'
+          - '3.7'
+          - '3.8'
+          - '3.9'
         httplib:
           - default
           - fido
@@ -19,9 +21,9 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.7
+          python-version: ${{ matrix.python }}
       - run: pip install tox
-      - run: tox -e ${{ matrix.python }}-${{ matrix.httplib }}
+      - run: tox -e $(tr -d . <<<${{ matrix.python }})-${{ matrix.httplib }}
 
   misc:
     runs-on: ubuntu-18.04
@@ -35,6 +37,6 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.7
+          python-version: 3.9
       - run: pip install tox
       - run: tox -e ${{ matrix.tox }}

setup.py

@@ -29,6 +29,8 @@
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
     package_data={
         'bravado': ['py.typed'],

tox.ini

@@ -1,5 +1,9 @@
 [tox]
-envlist = {py27,py36,py37}-{default,fido}, {py27,py36,py37}-fido-requests2dot17, mypy, pre-commit
+envlist =
+    {py27,py36,py37,py38,py39}-{default,fido}
+    {py27,py36,py37,py38,py39}-fido-requests2dot17
+    mypy
+    pre-commit
 
 [testenv]
 deps =
@@ -23,7 +27,7 @@ commands =
     pre-commit {posargs:run --all-files}
 
 [testenv:mypy]
-basepython = python3.7
+basepython = python3
 deps =
     # TODO: Latest twisted (>=21) and mypy (0.8XX) don't get along. Remove when they're friends again.
     #