Replace Travis CI with GitHub Actions

Author: hugovk

.github/workflows/test.yml

@@ -0,0 +1,33 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: pip cache
+        uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key:
+            ${{ matrix.os }}-${{ matrix.python-version }}-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ matrix.os }}-${{ matrix.python-version }}-
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --upgrade nox virtualenv
+
+      - name: Nox build
+        run: |
+          python -m nox -s build