run linting and testing only once in CI

Author: rlouf

Diff for: .github/workflows/lint.yml

@@ -1,6 +1,12 @@
 name: Check formatting
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   lint:

Diff for: .github/workflows/test.yml

@@ -1,6 +1,12 @@
 name: Run tests
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   test: