brolgar

This is a major release to signify that this version is associated with a
publication (woo!) for this paper in the R Journal. However, this release only
represents minor changes, summarised below:

• small fix for dev dplyr 113
• minor updates to GH actions and website.

Bug fixes

• Address bug with not creating equal strata
• Address warnings when using b_diff_summary, which now returns NA if there is
  only one observation, as we can't take the difference of one observation, and
  a difference of 0 in these cases would be misleading.