Switch from Travis -> Github actions. (ros2#948)

Signed-off-by: Chris Lalancette <[email protected]>

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+ test:
+ runs-on: ubuntu-20.04
+ steps:
+ - uses: actions/checkout@v2
+
+ - name: Setup Python
+ uses: actions/setup-python@v1
+ with:
+ python-version: 3.8
+
+ - name: Install dependencies with pip
+ run: |
+ pip install doc8 sphinx
+ pip install git+https://github.com/osrf/sphinx-tabs
+
+ - run: make html 2> stderr.log
+ - run: cat stderr.log
+ - run: doc8 --ignore D001 --ignore-path build --ignore-path source/Tutorials/Actions
+ # ignore D000 in action tutorials to allow for :linenos:
+ - run: doc8 --ignore D000 --ignore D001 --ignore-path build source/Tutorials/Actions
+ # fail the build for any stderr output
+ - run: if [ -s "stderr.log" ]; then false; fi