Update minimum nix version

Author: eldruin

Cargo.toml

@@ -21,7 +21,7 @@ Provides API for safe access to Linux i2c device interface.
 libc = "0.2"
 bitflags = "2.3"
 byteorder = "1"
-nix = { version = "0.26", default-features = false, features = ["ioctl"] }
+nix = { version = "0.26.2", default-features = false, features = ["ioctl"] }
 
 [dev-dependencies]
 docopt = "1"