Minor wording

Author: BakerNet

styleguide/packages.md

@@ -1,5 +1,5 @@
 # Packages
 
-Any package which is vital for use in a CLI tool to parse `.codeowners` files ought to be in `pkg`.  These packages could be easily used by third party developers to build on top of Codeowners Plus.
+Any package which is vital for use in a CLI tool to parse `.codeowners` files or work with file-reviewer mappings ought to be in `pkg`.  These packages could be easily used by third party developers to build on top of Codeowners Plus.
 
 Packages which require external or environmental dependencies such as `git` and `github` should live in `internal`.  These internal packages should never be imported in `pkg` (exposed) packages.