Adds continuous integration with Github Actions

.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: Python Test
+
+on:
+  push:
+    branches: [ v2 ]
+  pull_request:
+    branches: [ v2 ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.9
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8 pytest
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Setup config file
+      run: |
+        cp bdfr/default_config.cfg ./test_config.cfg
+        echo "" >> ./test_config.cfg
+        echo "user_token = ${{ secrets.REDDIT_TEST_TOKEN }}" >> ./test_config.cfg
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+    - name: Test with pytest
+      run: |
+        pytest -m 'not slow' --verbose