Merge pull request #535 from DyfanJones/roxygen2

bump roxygen2 to 7.2.1

Author: Larefly

paws.common/DESCRIPTION

@@ -33,7 +33,7 @@ Suggests:
     testthat
 SystemRequirements: pandoc (>= 1.12.3) - http://pandoc.org
 Roxygen: list(markdown = TRUE, roclets = c("rd", "namespace", "collate"))
-RoxygenNote: 7.1.1
+RoxygenNote: 7.2.1
 Collate:
     'RcppExports.R'
     'struct.R'