Does minimum setup such that a tibble returned by your package
is handled using the tibble method for generics like print() or [.
Presumably you care about this if you've chosen to store and expose an
object with class tbl_df. Specifically:
Check that the active package uses roxygen2
Add the tibble package to "Imports" in DESCRIPTION
Reveal the roxygen directive necessary to import at least one function
from tibble.
Offer support re: where to put this directive. Preferred location is
in the roxygen snippet produced by use_package_doc().
This is necessary when your package returns a stored data object
that has class tbl_df, but the package code does not make direct use of
functions from the tibble package. If you do nothing, the tibble namespace
is not necessarily loaded and your tibble may therefore be printed and
subsetted like a base data.frame.