usethis 1.6.1

Patch release to align some path handling internals with an update coming in the fs package.

• use_github_links() is a bit more clever about remotes (e.g. origin
  vs. upstream), which makes it easier to make a PR that adds GitHub links for
  a package you've forked.

• use_pkgdown() now .gitignores the destination directory and only adds the
  destination directory to the config file if it departs from the default
  (which is docs/).

• use_tidy_ci() is now deprecated in favour of use_tidy_github_actions()
  (#1098).

• use_github_action_check_standard() is a new intermediate workflow that
  checks on more platforms than _release, but is less exhaustive than _full
  (@jimhester).

• create_tidy_package() now uses an MIT license (@topepo, #1096).