Log Message:
(devel/R-pak) Updated 0.4.0 to 0.5.1

# pak 0.5.1

* No user visible changes.

# pak 0.5.0

* The `meta_*()` functions now consider the `platforms`, `cran_mirror` and
  `r_versions` config entries, see `?"pak-config"`.

* Better Posit Package Manager (PPM) support. New `+ppm_has_binaries()`,
  `ppm_r_versions()`, `ppm_repo_url()`, `ppm_snapshots()` and `ppm_platforms()`
  functions to help interacting with PPM. See the new 'pkgcache and Posit
  Package Manager on Linux' article at https://r-lib.github.io/pkgcache.
  (r-lib/pkgcache#47 and r-lib/pkgdepends#186).

* New `system_r_platform()` and `system_r_platform_data()` functions to query
  the current platform.

* pak now support git repositories as package references. E.g.
  `git::https://github.com/r-lib/pak.git`.

* pak now supports versioned CRAN packages, e.g. `dplyr@1.1.1` will
  always install dplyr 1.1.1. Note that only CRAN packages are supported,
  Bioconductor packages are not (yet).

* pak now has an alternative system requirements lookup
  implementation. It supports Fedora and Debian systems as well, in
  addition to Debian, Ubuntu, SUSE and RedHat derivatives.
  You can switch to this implementation by setting the
  `R_PKG_SYSREQS2` environment variable to `true`.

* pak now does a better job looking up dependencies for
  hand-selected dependency types. E.g. `dependencies = "LinkingTo"`.

* pak now removes `?ignore`-d packages from dependencies, and
  uses the correct version comparison for `?ignore-before.r`
  (https://github.com/r-lib/actions/issues/708).

* pak now does not fail for circular soft dependencies (#306).

* pak now reports dependency solver failures better in some cases
  (#305, https://github.com/r-lib/pak/issues/474).

* pak now uses locally built CRAN binaries from the cache. Use the
  `?nocache` parameter to opt out from this, or
  `cache_delete(package = ...)` to remove a package from the cache.