pkgdepends 0.6.0

• Many system requirements improvements:

  • New sysreqs functions:
    • sysreqs_check_installed(): check if all required system packages
      are installed,
    • sysreqs_fix_installed(): install missing system packages,
    • sysreqs_db_list(): list system requirements database,
    • sysreqs_db_match(): match SystemRrequirements field(s) to database,
    • sysreqs_db_update(): update system requirements database,
    • sysreqs_install_plan(): look up system requirements for a package and
      its dependencies,
    • sysreqs_is_supported(): check if pkgdepends supports system
      requirements on your platform,
    • sysreqs_list_system_packages(): list installed system packages,
    • sysreqs_platforms(): list supported platforms.
    • New pkg_installation_proposal methods: get_sysreqs(), show_sysreqs()
      and update_sysreqs().
  • The output of $show_solution() now includes system requirements.
  • New sysreqs_platform configuration option.
  • pkgdepends now looks up system requirements asynchronously, during
    dependency resolution.
  • pkgdepends now does not reinstall system requirements by default,
    if they are already installed. (You can force a reinstallation/upgrade
    wtih the sysreqs_update configuration option.)

• New gitlab:: package source to install packages from GitLab (#315).

• pkgdepends now correctly parses multiple git:: packages at once (#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 (#314).

• The platforms config parameter now works correctly with deps::
  package sources (r-lib/pak#522).

• New include_linkingto config parameter to always include LinkingTo
  packages in the solution, even for binaries (#485).

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