Log Message:
(devel/R-cli) Updated 3.6.3 to 3.6.4

# cli 3.6.4

* Pluralization now handles edge cases (`NA`, `NaN`, `Inf` and `-Inf`)
  better (@rundel, #716).

* The URI generated for `.file`, `.run`, `.help` and `.vignette` hyperlinks
  can now be configured via options and env vars (@jennybc, #739, #744).

* `cli_progress_bar()` now accepts `total` = Inf or -Inf which mimics the
  behavior of when `total` is NA (@LouisMPenrod, #630).

* `num_ansi_colors()` now does not warn in Emacs if the `INSIDE_EMACS`
  environment variable is not a proper version number (@rundel, #689).

* `ansi_collapse()` and inline collapsing now uses `last` as the separator
  (without the serial comma) for two-element vectors if `sep2` is not
  given (@rundel, #681).

* `ansi_collapse()` is now correct for length-1 vectors with style "head"
  if width is specified (@rundel, #590).

* New `hash_xxhash()` etc. functions to calculate the xxHash of strings,
  raw vectors, objects, files.