Update nix dependency

Author: eldruin

CHANGELOG.md

@@ -4,8 +4,9 @@
 
 ### Changed
 
-- Migrated to 'tokio' crate. 
-- Minimmum supported Rust version updated to 1.31
+- Migrated to 'tokio' crate.
+- Updated `nix` to version 0.22.
+- Minimmum supported Rust version updated to 1.46.0.
 
 ## [0.5.3] - 2018-04-19
 

Cargo.toml

@@ -15,6 +15,6 @@ use_tokio = ["futures", "tokio", "mio-evented"]
 
 [dependencies]
 futures = { version = "0.1", optional = true }
-nix = "0.14.0"
+nix = "0.22"
 mio = { version = "0.6", optional = true }
 tokio = { version = "0.1", optional = true }

README.md

@@ -86,7 +86,7 @@ The following features are planned for the library:
 
 ## Minimum Supported Rust Version (MSRV)
 
-This crate is guaranteed to compile on stable Rust 1.31 and up.  It *might*
+This crate is guaranteed to compile on stable Rust 1.46.0 and up.  It *might*
 compile with older versions but that may change in any new patch release.
 
 ## Cross Compiling

src/error.rs

@@ -44,9 +44,6 @@ impl convert::From<io::Error> for Error {
 #[cfg(not(target_os = "wasi"))]
 impl convert::From<nix::Error> for Error {
     fn from(e: nix::Error) -> Error {
-        match e {
-            nix::Error::Sys(errno) => Error::Io(errno.into()),
-            other => Error::Unexpected(format!("{:?}", other)), // should just be dealing with errno case
-        }
+        Error::Io(e.into())
     }
 }