Create Github Action to run flake8 and tests

.github/workflows/pythonapp.yml

@@ -0,0 +1,27 @@
+name: Python application
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    env:
+      PYFLAKES_BUILTINS: Actor,Rect,ZRect,animate,clock,exit,images,keyboard,keymods,keys,mouse,music,screen,sounds,storage,tone 
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.7
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt -r requirements-dev.txt
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 --count pgzero pgzrun.py test
+    - name: Run tests
+      run: |
+        python setup.py test