CI: Add a minimal GitHub Actions config

Author: PMeira

.github/workflows/tests.yml

@@ -0,0 +1,36 @@
+name: Test
+
+on: 
+  push:
+
+jobs:
+  test:
+    name: 'Tests'
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps: 
+      - uses: actions/checkout@v3
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pandas matplotlib pytest
+          python -m pip install -e .[extras]
+
+      - name: Test
+        run: |
+          pytest -vv
+
+      - name: Test (debug version on Linux only)
+        if: runner.os == 'Linux'
+        run: |
+          DSS_EXTENSIONS_DEBUG=1 pytest -vv