Switch from Travis CI to GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  # Test the Python package itself
+  test_python:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - 3.6
+          - 3.7
+          - 3.8
+          - 3.9
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install Python dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install setuptools pytest
+
+    - name: Install package
+      run: |
+        pip install .
+
+    - name: Test with pytest
+      run: |
+        pytest

README.md

@@ -1,4 +1,5 @@
 # pyorg
+[![CI](https://github.com/jlumpe/pyorg/actions/workflows/ci.yml/badge.svg)](https://github.com/jlumpe/pyorg/actions/workflows/ci.yml)
 [![Documentation Status](https://readthedocs.org/projects/pyorg/badge/?version=latest)](https://pyorg.readthedocs.io/en/latest/?badge=latest)
 
 Python library for working with Emacs org mode.