declare minimum rust version as 1.40.0 (for `mem::take`)
declare minimum rust version as 1.40.0 (for `mem::take`)


In practice, this has little effect,
as this setting is only supported in the latest cargo versions anyway,
so users with an outdated rust setup
will still not get a nice error message.
It does not hurt though,
and maybe they stumble over it in the config file.

google/xi-editor,google/xi-editor,google/xi-editor,google/xi-editor