Run integration tests on pull requests (#16)

* Run integration tests on pull requests

* Bumped pip to 20.3.3; removed pip upgrade in workflow

.github/workflows/build-and-test.yml

@@ -0,0 +1,27 @@
+name: Build and test
+
+on:
+  pull_request
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+        python-version: ['3.7', '3.8']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install -r requirements_dev.txt
+        python -m pip install -e .
+    - name: Integration tests
+      run: |
+        python -m pytest tests/integration

requirements_dev.txt

@@ -1,4 +1,4 @@
-pip==20.0.2
+pip==20.3.3
 wheel==0.34.2
 twine==3.1.1
 pytest==6.2.1