Add push trigger for dev branch in workflow

Author: CoryMcCartan

.github/workflows/check-dev.yaml

@@ -1,6 +1,8 @@
 # Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
 # Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
+  push:
+    branches: [dev]
   pull_request:
     branches: [dev]