generic action for CI at PR

.github/workflows/testing_pr.yml

@@ -0,0 +1,34 @@
+name: "Testing Pull Request"
+
+on:
+  pull_request:
+    branches:
+      - "master"
+
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, macos-latest, ubuntu-latest]
+        python-version: [3.7, 3.8]
+
+    steps:
+    - uses: actions/checkout@v2
+
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install Python dependencies
+      run: |
+        python3 -m pip install --upgrade pip
+        python3 -m pip install .[test]
+
+    - name: Test with pytest
+      run: |
+        python3 -m pytest