tadaadata/tadaatoolbox: Now with more less

tadaatoolbox 0.16.0

This release is primarily about reducing the number of dependencies, which was just silly.
As a bonus, we add two minor convenience functions that make teaching a little easier for us, and we even fix a derp.

Fixes & Features

• Add ord_pairs to retrieve $N_c$, $N_d$, ties and total number of pairs for contingency tables. Internals for this function are straight up copied from this gist.
• Add etasq in case you want to show students what $\eta^2$ is without having to explain ANOVA.
• Fix ord_somers_d not returning the correct value for symmetric = TRUE
• Removed drop_labels because sjlabelled::zap_labels is a thing

Internals

• Eliminate ryouready dependency, in favor of the more versatile DescTools package:
  • nom_lambda: Use DescTools::Lambda
  • ord_gamma: Use DescTools::GoodmanKruskalGamma
  • ord_somers_d: Use DescTools::SomersDelta
• Eliminate vcd dependency, also in favor of DescTools.
• (The DescTools functions are very similar to what the wrappers do, so the wrappers might be removed in the future.)
• Eliminate lazyeval dependency in tadaa_int by being better at ggplot2.
• Eliminate dplyr dependency by being better at R.
• Eliminate haven dependency by not re-exporting as_factor anymore ¯\_(ツ)_/¯
• Eliminate sjmisc depencency because why did we depend on that again?
• Eliminate sjlabelled dependency (only used for re-exports).
• Eliminate lsr dependency in favor of, you guessed it, DescTools for eta in tadaa_aov.