test builds in draft PR

Author: 2bndy5

.github/workflows/wheels.yml

@@ -7,7 +7,8 @@ on:
     - wheels-*
     tags:
     - 'v*'
-  workflow_dispatch: # REMOVE THIS BEFORE PR
+  pull_request: # REMOVE THIS BEFORE PR
+    branches: [master]
 
 jobs:
   build_wheels: