build: try GitHub Actions CI for running tests

.github/workflows/pythonpackage.yml

@@ -0,0 +1,31 @@
+name: Python package
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      max-parallel: 2
+      matrix:
+        # GitHub Actions / build (2.7) successful in 1h 30m 7s
+        python-version: [2.7, 3.6, 3.7]  # [2.7, 3.5, 3.6,, 3.7] 
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt || true
+    - name: make lint
+      run: |
+        make lint
+    - name: make test
+      continue-on-error: true
+      run: |
+        python ./configure.py
+        make test