rethink `standardize_names` argument implementation

[IndrajeetPatil]

Currently, setting it to TRUE makes no difference because the names are already standardized.

library(correlation)

waldo::compare(
  correlation(cars, standardize_names = FALSE),
  correlation(cars, standardize_names = TRUE)
)
#> v No differences

^{Created on 2021-11-25 by the reprex package (v2.0.1)}

I think the way this should work is with the default argument being standardize_names = "easystats", which would be backward-compatible. And, if someone wishes, they can change it to standardize_names = "broom".

This lets users have a better control over the column naming style.

[bwiernik]

Good idea