ipums_view() requires that the htmltools, shiny, and DT packages are
installed. If launch = TRUE, RStudio and the rstudioapi package must
also be available.
Note that if launch = FALSE and out_file is unspecified, the output
file will be written to a temporary directory. Some operating systems
may be unable to open the HTML file from the temporary directory; we
suggest that you manually specify the out_file location in this case.