Replace Travis CI with GitHub Actions

.github/workflows/python.yml

@@ -0,0 +1,30 @@
+name: Python package
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.4, 3.7, 3.8]
+
+    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 dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pyusb coverage coveralls pyserial PyYAML tqdm
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Build package
+      run: |
+        python setup.py build
+    - name: Test with unittest
+      run: |
+        coverage run --source=stcgal setup.py test
+        coveralls

.travis.yml

@@ -1,16 +0,0 @@
-sudo: required
-dist: trusty
-language: python
-cache:
-  - pip
-python:
-  - "3.4"
-  - "3.5"
-  - "3.6"
-  #- "pypy3"
-install:
-  - pip install pyusb coverage coveralls pyserial PyYAML tqdm
-script:
-  - python setup.py build
-  - coverage run --source=stcgal setup.py test
-  - coveralls