Update and rename pythonapp.yml to pcb-tools.yml

.github/workflows/pcb-tools.yml

@@ -4,6 +4,10 @@ on: [push, pull_request]
 
 jobs:
   build:
+    strategy:
+      matrix:
+        python: [3.7]
+
     runs-on: ubuntu-latest
 
     steps:
@@ -11,7 +15,7 @@ jobs:
     - name: Set up Python 3.7
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: ${matrix.python}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip