replace tempdir with tempfile, as tempdir is deprecated

Cargo.toml

@@ -24,7 +24,7 @@ libssh2-sys = { path = "libssh2-sys", version = "0.3.0" }
 parking_lot = "0.11"
 
 [dev-dependencies]
-tempdir = "0.3"
+tempfile = "3"
 
 [workspace]
 members = ['systest']

tests/all/main.rs

@@ -1,7 +1,7 @@
 #![deny(warnings)]
 
 extern crate ssh2;
-extern crate tempdir;
+extern crate tempfile;
 
 use std::env;
 use std::net::TcpStream;

tests/all/session.rs

@@ -2,7 +2,7 @@ use std::env;
 use std::fs::File;
 use std::io::{self, prelude::*};
 use std::path::Path;
-use tempdir::TempDir;
+use tempfile::TempDir;
 
 use ssh2::{BlockDirections, HashType, KeyboardInteractivePrompt, MethodType, Prompt, Session};
 
@@ -163,7 +163,7 @@ fn scp_recv() {
 
 #[test]
 fn scp_send() {
- let td = TempDir::new("test").unwrap();
+ let td = TempDir::new().unwrap();
  let sess = ::authed_session();
  let mut ch = sess
  .scp_send(&td.path().join("foo"), 0o644, 6, None)

tests/all/sftp.rs

@@ -1,6 +1,6 @@
 use std::fs::{self, File};
 use std::io::prelude::*;
-use tempdir::TempDir;
+use tempfile::TempDir;
 
 #[test]
 fn smoke() {
@@ -10,7 +10,7 @@ fn smoke() {
 
 #[test]
 fn ops() {
- let td = TempDir::new("foo").unwrap();
+ let td = TempDir::new().unwrap();
  File::create(&td.path().join("foo")).unwrap();
  fs::create_dir(&td.path().join("bar")).unwrap();
 
@@ -53,7 +53,7 @@ fn ops() {
 
 #[test]
 fn not_found() {
- let td = TempDir::new("foo").unwrap();
+ let td = TempDir::new().unwrap();
 
  let sess = ::authed_session();
  let sftp = sess.sftp().unwrap();