Update on CRAN pre-issue

[malcolmbarrett]

@LucyMcGowan we should get #5 on CRAN. This is a pre-issue because a couple of things need to be done before getting started

• usethis::use_dev_version()
• usethis::use_release_issue()

Then close this to use the usethis generated issue

[malcolmbarrett]

ping @LucyMcGowan; just noticing that this fix never got on cran