Routine dependencies update (#533)

* Update dependencies

* Replace deprecated tempdir with tempfile

tokio-threadpool/tests/blocking.rs

@@ -19,7 +19,7 @@ use std::thread;
 
 #[test]
 fn basic() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let pool = Builder::new()
         .pool_size(1)