infer 0.4.0

Breaking changes

Changed method of computing two-sided p-value to a more conventional one. It also makes get_pvalue() and visualize() more aligned (#205).

Deprecated p_value() (use get_p_value() instead) (#180).
Deprecated conf_int() (use get_confidence_interval() instead) (#180).
Deprecated (via warnings) plotting p-value and confidence interval in visualize() (use new functions shade_p_value() and shade_confidence_interval() instead) (#178).

shade_p_value() - {ggplot2}-like layer function to add information about p-value region to visualize() output. Has alias shade_pvalue().
shade_confidence_interval() - {ggplot2}-like layer function to add information about confidence interval region to visualize() output. Has alias shade_ci().

Account for NULL value in left hand side of formula in specify() (#156) and type in generate() (#157).
Update documentation code to follow tidyverse style guide (#159).
Remove help page for internal set_params() (#165).
Fully use {tibble} (#166).
Fix calculate() to not depend on order of p for type = "simulate" (#122).
Reduce code duplication (#173).
Make transparancy in visualize() to not depend on method and data volume.
Make visualize() work for "One sample t" theoretical type with method = "both".
Add stat = "sum" and stat = "count" options to calculate() (#50).