[ENH] Support tidyr 1.3.0

[pwwang]

Feature Type

• Adding new functionality to datar

• Changing existing functionality in datar

• Removing existing functionality in datar

Problem Description

• https://github.com/tidyverse/tidyr/releases/tag/v1.3.0

Feature Description

• New family of consistent string separating functions:
  separate_wider_delim(), separate_wider_position(),
  separate_wider_regex(), separate_longer_delim(), and
  separate_longer_position().
• nest() gains a .by argument which allows you to specify the columns to
  nest by (rather than the columns to nest, i.e. through ...). Additionally,
  the .key argument is no longer deprecated, and is used whenever ... isn't
  specified
• pivot_longer() gains a cols_vary argument for controlling the ordering of
  the output rows relative to their original row number
• New datasets who2, household, cms_patient_experience, and
  cms_patient_care to demonstrate various tidying challenges

Additional Context

No response