Update to hyper 0.13

src/blocking/request.rs

@@ -1,7 +1,7 @@
 use std::fmt;
+use std::convert::TryFrom;
 
 use base64::encode;
-use http::HttpTryFrom;
 use serde::Serialize;
 #[cfg(feature = "json")]
 use serde_json;
@@ -140,13 +140,15 @@ impl RequestBuilder {
     /// ```
     pub fn header<K, V>(mut self, key: K, value: V) -> RequestBuilder
     where
-        HeaderName: HttpTryFrom<K>,
-        HeaderValue: HttpTryFrom<V>,
+        HeaderName: TryFrom<K>,
+        HeaderValue: TryFrom<V>,
+        <HeaderName as TryFrom<K>>::Error: Into<http::Error>,
+        <HeaderValue as TryFrom<V>>::Error: Into<http::Error>,
     {
         let mut error = None;
         if let Ok(ref mut req) = self.request {
-            match <HeaderName as HttpTryFrom<K>>::try_from(key) {
-                Ok(key) => match <HeaderValue as HttpTryFrom<V>>::try_from(value) {
+            match <HeaderName as TryFrom<K>>::try_from(key) {
+                Ok(key) => match <HeaderValue as TryFrom<V>>::try_from(value) {
                     Ok(value) => {
                         req.headers_mut().append(key, value);
                     }