Patch to support nix 0.23 #17
Description
In Debian we try where possible to keep only one version of each crate in the archive and we bump dependenices and apply patches accordingly. While testing your crate with a new version of nix I discovered that a slight code change was needed as "as_errno" was deprecated and made into a no-op in nix 0.22 and removed in nix 0.26.
Our patch can be found at https://salsa.debian.org/rust-team/debcargo-conf/-/blob/master/src/libmount/debian/patches/nix.diff
Note: in Debian we set the upper limit as <1.0, we essentially trade some risk of breakage for not having to bump the dependency every time a new version is uploaded, that is ok within our QA processes in Debian but almost certainly isn't appropriate upstream.