ci: switch to github actions

.github/workflows/python.yml

@@ -0,0 +1,30 @@
+name: Test
+
+on:
+  pull_request:
+    branches:
+    - 'master'
+  push:
+    branches:
+    - 'master'
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  test:
+    name: pytest
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['2.7', '3.4', '3.5', '3.6']
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+    - run: pip install -r requirements.txt
+    - run: pytest