Add revdep results to the cran-comments

Author: jimhester

cran-comments.md

@@ -16,3 +16,10 @@ not observe the issue.
 ## R CMD check results
 
 0 errors | 0 warnings | 0 note
+
+## revdepcheck results
+
+We checked 2 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