Swith to a Github action for CI testing

This is a basic initial version based on h11#89 and Hynek's Python in
GitHub Actions article.

Author: pgjones

.github/workflows/ci.yml

@@ -0,0 +1,60 @@
+name: CI
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+
+jobs:
+  tox:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 5
+      matrix:
+        python-version:
+        - 3.6
+        - 3.7
+        - 3.8
+
+    steps:
+    - uses: actions/checkout@master
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install tox
+      run: |
+        python -m pip install --upgrade pip setuptools
+        pip install --upgrade tox tox-gh-actions
+    - name: Initialize tox envs
+      run: |
+        tox --parallel auto --notest
+    - name: Test with tox
+      run: |
+        tox --parallel 0
+
+  autobahn:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        side: [client, server]
+
+    steps:
+    - uses: actions/checkout@master
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.8
+    - name: Install tox
+      run: |
+        python -m pip install --upgrade pip
+        pip install --upgrade tox
+    - name: Initialize tox envs
+      run: |
+        tox --parallel auto --notest -e autobahn
+    - name: Run autobahn
+      run: |
+        tox --parallel 0 -e autobahn
+      env:
+        SIDE: ${{ matrix.side }}

.travis.yml

@@ -1,24 +1,25 @@
 [tox]
-envlist = py36, py37, py38, pypy, format, mypy, lint, packaging, docs
+envlist = py36, py37, py38, pypy, format, mypy, lint, docs, packaging
+
+[gh-actions]
+python =
+    3.6: py36
+    3.7: py37
+    3.8: py38, format, mypy, lint, docs, package
+    pypy: pypy
 
 [testenv]
 deps =
     pytest==5.2.2
     pytest-cov==2.8.1
-    {env:CI_DEPS:}
-    {env:EXTRA_DEPS:}
-passenv = CODECOV_TOKEN CI CI_* TRAVIS TRAVIS_*
 commands =
     pytest --cov=wsproto {posargs}
-    {env:CI_COMMANDS:python -c ""}
 
 [testenv:pypy]
 # temporarily disable coverage testing on PyPy due to performance problems
 commands = pytest {posargs}
 
 [testenv:autobahn]
-deps =
-    {env:EXTRA_DEPS:}
 changedir = {toxinidir}/compliance
 commands =
     python run-autobahn-tests.py {env:SIDE:}