Update serde to 0.9.3 and use serde::ser::Impossible

1 files changed, 2 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 8fefd77..285a091 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,11 +1,12 @@
 //! `x-www-form-urlencoded` meets Serde
 
+#![warn(unused_extern_crates)]
+
 extern crate itoa;
 extern crate dtoa;
 #[macro_use]
 extern crate serde;
 extern crate url;
-extern crate void;
 
 pub mod de;
 pub mod ser;