ci: convert to github actions

.github/workflows/pythonpackage.yml

@@ -0,0 +1,37 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Python package
+
+on: [ push, pull_request ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.5, 3.6, 3.7, 3.8]
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        pip install poetry
+        poetry run python -m pip install --upgrade pip
+        poetry run python -m pip install --upgrade setuptools
+        poetry install
+    - name: Lint Python code
+      run: poetry run flake8
+    - name: Build package
+      run: poetry build
+    - name: Lint docs
+      run: poetry run doc8
+    - name: Build html docs
+      run: poetry run make -C doc html