fix(hyper): update to hyper v0.4.0

* `hyper::HttpError` is now the more versatile `hyper::Error`

src/device.rs

@@ -71,7 +71,7 @@ impl fmt::Display for PollInformation {
 /// Encapsulates all possible results of the `request_token(...)` operation
 pub enum RequestError {
     /// Indicates connection failure
-    HttpError(hyper::HttpError),
+    HttpError(hyper::Error),
     /// The OAuth client was not found
     InvalidClient,
     /// Some requested scopes were invalid. String contains the scopes as part of 
@@ -116,7 +116,7 @@ impl fmt::Display for RequestError {
 #[derive(Debug)]
 pub enum PollError {
     /// Connection failure - retry if you think it's worth it
-    HttpError(hyper::HttpError),
+    HttpError(hyper::Error),
     /// indicates we are expired, including the expiration date
     Expired(DateTime<UTC>),
     /// Indicates that the user declined access. String is server response

src/helper.rs

@@ -395,7 +395,7 @@ pub trait AuthenticatorDelegate {
     /// Called whenever there is an HttpError, usually if there are network problems.
     /// 
     /// Return retry information.
-    fn connection_error(&mut self, &hyper::HttpError) -> Retry {
+    fn connection_error(&mut self, &hyper::Error) -> Retry {
         Retry::Abort
     }
 

src/refresh.rs

@@ -24,7 +24,7 @@ pub struct RefreshFlow<C> {
 /// All possible outcomes of the refresh flow
 pub enum RefreshResult {
     /// Indicates connection failure
-    Error(hyper::HttpError),
+    Error(hyper::Error),
     /// The server did not answer with a new token, providing the server message
     RefreshError(String, Option<String>),
     /// The refresh operation finished successfully, providing a new `Token`
@@ -37,7 +37,7 @@ impl<C> RefreshFlow<C>
     pub fn new(client: C) -> RefreshFlow<C> {
         RefreshFlow {
             client: client,
-            result: RefreshResult::Error(hyper::HttpError::HttpStatusError),
+            result: RefreshResult::Error(hyper::Error::TooLarge),
         }
     }