Switch Travis CI to GitHub Actions.

Author: QuLogic

.github/workflows/tests.yml

@@ -0,0 +1,45 @@
+---
+
+name: Tests
+
+on:
+  push:
+    branches-ignore:
+      - auto-backport-of-pr-[0-9]+
+      - v[0-9]+.[0-9]+.[0-9x]+-doc
+  pull_request:
+
+jobs:
+  test:
+    name: "Python ${{ matrix.python-version }} ${{ matrix.name-suffix }}"
+    runs-on: ubuntu-18.04
+
+    strategy:
+      matrix:
+        python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9"]
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - 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 setuptools wheel
+          python -m pip install --upgrade pytest pytest-cov pytest-xdist
+
+      - name: Install cycler
+        run: |
+          python -m pip install --no-deps .
+
+      - name: Run pytest
+        run: |
+          pytest -raR -n auto --cov --cov-report=
+
+      - name: Upload code coverage
+        uses: codecov/codecov-action@v1