Update cran-comments for release

Author: jimhester

cran-comments.md

@@ -11,7 +11,7 @@
 
 ## revdepcheck results
 
-We checked 14 reverse dependencies, comparing R CMD check results across CRAN and dev versions of this package.
+We checked 21 reverse dependencies, comparing R CMD check results across CRAN and dev versions of this package.
 
  * We saw 0 new problems
  * We failed to check 0 packages