import: Add updater for rust crates.

* guix/import/crate.scm (crate-package?, latest-release,
  %crate-updater): New variables.
* guix/scripts/refresh.scm (%updaters): Add crate updater.
* doc/guix.texi: Add crate updater to table.

1 files changed, 2 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 5db20ecdfa..a5424b4e01 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5396,6 +5396,8 @@ the updater for @uref{https://rubygems.org, RubyGems} packages.
 the updater for @uref{https://github.com, GitHub} packages.
 @item hackage
 the updater for @uref{https://hackage.haskell.org, Hackage} packages.
+@item crate
+the updater for @uref{https://crates.io, Crates} packages.
 @end table
 
 For instance, the following command only checks for updates of Emacs