Upgrade to nix version 0.11
diff --git a/Cargo.toml b/Cargo.toml
index 52188d8..9b940d8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@
 unicode-segmentation = "1.0"
 
 [target.'cfg(unix)'.dependencies]
-nix = "0.10"
+nix = "0.11"
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = ["consoleapi", "handleapi", "minwindef", "processenv", "winbase", "wincon", "winuser"] }