just do test on pr and master

.github/workflows/pythonapp.yml

@@ -1,6 +1,13 @@
 name: Python application
 
-on: [push]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+      - development
 
 jobs:
   build: