Add 200 as proper CDUP response code fixes #73 (#79)

* Add 200 as a proper CDUP response code

* Bump version from 3.0.0 -> 3.0.1

Author: mattnenterprise

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ftp"
-version = "3.0.0"
+version = "3.0.1"
 authors = ["Matt McCoy <[email protected]>"]
 documentation = "https://docs.rs/ftp/"
 repository = "https://github.com/mattnenterprise/rust-ftp"

src/ftp.rs

@@ -209,7 +209,7 @@ impl FtpStream {
     /// Move the current directory to the parent directory.
     pub fn cdup(&mut self) -> Result<()> {
         try!(self.write_str("CDUP\r\n"));
-        self.read_response(status::REQUESTED_FILE_ACTION_OK).map(|_| ())
+        self.read_response_in(&[status::COMMAND_OK, status::REQUESTED_FILE_ACTION_OK]).map(|_| ())
     }
 
     /// Gets the current directory