Port from Travis to Actions

.github/workflows/actions.yml

@@ -0,0 +1,43 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: postgres:11
+
+    strategy:
+      matrix:
+        python-version: [3.8, 3.9]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Python ${{ matrix.python-version }}
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Lint (black)
+      - uses: psf/black@stable
+        with:
+          args: ". --check"
+
+      - name: Install dependencies
+        run: |
+          pip install -r requirements-test.txt
+          pip install -r requirements-cli.txt
+          pip install -r requirements-build.txt
+          pip install coveralls
+
+      - name: Run tests
+        run: |
+          psql -c 'create database conbench_test;' -U postgres
+          coverage run --source conbench -m pytest conbench/tests/
+
+      - name: Publish coverage
+        run: |
+          coveralls