Updating CI trigger and adding pytest

.github/workflows/ci.yml

@@ -3,11 +3,7 @@
 
 name: pysiaf CI
 
-on:
-  push:
-    branches: [ $default-branch ]
-  pull_request:
-    branches: [ $default-branch ]
+on: [push, pull_request]
 
 jobs:
   build:
@@ -26,14 +22,11 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest
+        python -m pip install pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-    - 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
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Install Package
       run: |
         python setup.py install
+    - name: Run Tests
+      run: |
+        pytest