pak 0.6.0

• pak now requires R >= 3.5.0.

• Many improvements in system requirements support:

  • New functions:
    • pkg_sysreqs(): calculate system requirements of packages.
    • sysreqs_db_list(), sysreqs_db_match(), sysreqs_db_update():
      query the system requirements database.
    • sysreqs_list_system_packages(), sysreqs_check_installed(),
      sysreqs_fix_installed(): query and install missing system packages.
    • sysreqs_platforms(): list supported platforms.
  • The installation proposal, printed before installation, now includes
    required and missing system packages, on supported platforms.
  • New sysreqs_platform configuration option to override the auto-detected
    platform.
  • Faster, asynchronous system requirements lookup.
  • pak now does not reinstall system requirements by default,
    if they are already installed. (You can force a reinstall/upgrade
    with the sysreqs_update configuration option.)

• New gitlab:: package source to install packages from GitLab
  (r-lib/pkgdepends#315).

• pak now correctly parses multiple git:: packages at once
  (r-lib/pkgdepends#318).

• git:: package sources now support version 1 of the git protocol.
  E.g. the Bioconductor git repositories now work:
  git::https://git.bioconductor.org/packages/limma
  (r-lib/pkgdepends#314).

• The platforms config parameter now works correctly with deps::
  package sources (#522).

• New include_linkingto config parameter to always include LinkingTo
  packages in the solution, even for binaries
  (https://github.com/r-lib/pkgdepends/issues/485).

• pkg_name_check() now does not include Acromine results, because the web
  site was unstable.

• In repo_add() and repo_resolve() the MRAN@ prefix is now deprecated
  and resolves to PPM, because MRAN will be retired soon. See more at
  https://posit.co/blog/migrating-from-mran-to-posit-package-manager/.

• The metadata cache now has SystemRequirements information for Bioconductor
  packages.