added mmap branch

Author: dipterix

.github/workflows/R-CMD-check.yaml

@@ -6,7 +6,7 @@
 # usethis::use_github_action("check-standard") will install it.
 on:
   push:
-    branches: [main, master, release, bug]
+    branches: [main, master, release, mmap]
   pull_request:
     branches: [main, master]