schtools 0.3.1

• Fixes for API changes in ggplot2 v3.4.0 and tidyselect v1.2.0 (#42, #44, @kelly-sovacool).
• pool_taxon_counts() now takes the taxon_level argument as a character
  rather than a data variable (#43, @kelly-sovacool).

Full Changelog: v0.3.0...v0.3.1