name: Build
on: 
  push:
    branches:
      - master
      - tmp-*
    tags:
      - v*
  pull_request:

jobs:
  sre_yield:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        python-version: [3.6, 3.7, 3.8]
        os: [macOS-latest, ubuntu-latest, windows-latest]

    steps:
      - name: Checkout
        uses: actions/checkout@v1
      - name: Set Up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v1
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install
        run: |
          python -m pip install --upgrade pip
          make setup
          pip install -U .
      - name: Test
        run: make test
      - name: Lint
        run: make lint

Add github actions workflow to run tests on 3.6,3.7,3.8
Add github actions workflow to run tests on 3.6,3.7,3.8

You can manually run something similar with `tox -p all` locally.
