Merge pull request #262 from JuliaInterop/ChrisRackauckas-patch-1

Update CI.yml and fix master

Author: ViralBShah

.github/workflows/CI.yml

@@ -1,6 +1,8 @@
 # For help debugging build failures open an issue on the RStudio community with the 'github-actions' tag.
 # https://community.rstudio.com/new-topic?category=Package%20development&tags=github-actions
-on: push
+on: 
+  push:
+  pull_request:
 name: R-CMD-check
 
 jobs: