Multiple cleanups from neglect

.github/workflows/tests.yml

@@ -8,14 +8,20 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: [3.6, 3.7]
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.8
+    - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v1
       with:
-        python-version: 3.8
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        pip install tox tox-gh-actions
     - name: Test with tox
       run: |
-        pip install tox
         tox

.gitignore

@@ -1,7 +1,13 @@
 *.egg-info/
-*.py[cod]
+*.py[rcod]
 .cache/
 .coverage
 .eggs/
 .tox/
+.venv/
+build/
+coverage.*
+dist/
 doc/build/
+htmlcov/
+pip-wheel-metadata/

.python-version

@@ -0,0 +1,2 @@
+3.7.6
+3.6.7

CONTRIBUTING.rst

@@ -36,14 +36,14 @@ Unit tests are invoked by `Tox`_.
 Formatting
 ==========
 
-The formatting is done using `YAPF`_.
+The formatting is done using `Black`_.
 
 From the root for the project, run:
 
 .. code-block:: bash
 
     $ tox -e format
 
-.. _`YAPF`: https://github.com/google/yapf
+.. _`Black`: https://github.com/psf/black
 .. _`Tox`: https://tox.readthedocs.io/en/latest
 .. _`Issue`: https://github.com/metacloud/gilt/issues