withr 2.4.2

• local_options() now lets you set an option to NULL as intended (#156)

• local_tempfile() argument envir is deprecated, in favor of .local_envir.
  All withr functions except local_tempfile() used .local_envir to specify environments, so this makes this function consistent with the rest. (#157)

• with_environment() now passing pos and warn.conflicts to attach(), as intended (#161).

• with_seed() now also sets the RNG via new arguments .rng_kind, .rng_normal_kind and .rng_sample_kind
  (#162, @AshesITR).

• with_timezone() now works after recent changes to Sys.timezone() in R-devel (#165)