use of `:::`

[kellijohnson-NOAA]

When running devtools::check() I get the following

❯ checking dependencies in R code ... WARNING
  Unexported object imported by a ':::' call: 'tools:::RdTags'
    See the note in ?`:::` about the use of this operator.
    Including base/recommended package(s):
    'tools'

We could ask them to export it or we can just use a call to lapply() to get the tag names ourselves. @Bai-Li-NOAA do you have a preference?

[Bai-Li-NOAA]

Using lapply() seems like a quick fix. I have updated the code base and got rid of all the warnings and notes from running devtools::check().