actions: use Codecov

And test for Python 3.7 and 3.8

Signed-off-by: Paul Spooren <mail@aparcar.org>

.github/workflows/pythonapp.yml

@@ -4,17 +4,21 @@ on: [push]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [ 3.7, 3.8 ]
+    name: Python ${{ matrix.python-version }}
 
     steps:
     - uses: actions/checkout@v2
     - name: Install ImageBuilder prereqs
       run: sudo apt-get install -y libncurses5-dev
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v1
+    - uses: actions/setup-python@v1
       with:
-        python-version: 3.8
+        python-version: ${{ matrix.python-version }}
+    - name: Display Python version
+      run: python -c "import sys; print(sys.version)"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -34,4 +38,8 @@ jobs:
     - name: Test with pytest
       run: |
         pip install pytest
-        pytest --runslow
+        pip install coverage
+        coverage run -m pytest --runslow
+        coverage xml
+    - name: Codecov
+      uses: codecov/codecov-action@v1