tidypolars 0.6.0

tidypolars requires polars >= 0.15.0.

Breaking changes and deprecations

• as_polars() is deprecated and will be removed in 0.7.0. Use as_polars_lf()
  or as_polars_df() instead.

• as_polars() doesn't have an argument with_string_cache anymore. When set
  to TRUE, this enabled the string cache globally, which could lead to
  undesirable side effects.

• to_r() is deprecated and will be removed in 0.7.0. Use as.data.frame() or
  as_tibble() instead. This used to silently return a LazyFrame if the
  input was LazyFrame. It now automatically collects the LazyFrame (#88).

• pull() nows automatically collects input LazyFrame (#89).

New features

• Add support for argument .keep in mutate() (#80).

• Add support for group_vars() and group_keys() (#81).

• Experimental support of rowwise(). For now, this is limited to a few
  functions: mean(), median(), min(), max(), sum(), all(), any().
  rowwise() and group_by() cannot be used at the same time (#40).

• All functions that return a polars Data/LazyFrame now add the class
  "tidypolars" to the output (#86).

• Support which.min(), which.max(), dplyr::n().

• Support .data[[ and .env[[ in addition to .data$ and .env$. Better
  error messages when the objects specified in .data or .env don't exist.

Bug fixes

• pull() now errors when var is of length > 1.