Update errors to match current Error trait (#223)

- `description` is deprecated, and now with the 1.42 stable release
  these are generating warnings

- `cause` is deprecated and replaced by `source`

1 files changed, 1 insertions, 14 deletions

diff --git a/src/errors.rs b/src/errors.rs
index f0f70d7..5506198 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -65,20 +65,7 @@ impl fmt::Display for Error {
 }
 
 impl StdError for Error {
-    fn description(&self) -> &str {
-        match self {
-            Error::SerdeJsonError(e) => e.description(),
-            Error::Hyper(e) => e.description(),
-            Error::Http(e) => e.description(),
-            Error::IO(e) => e.description(),
-            Error::Encoding(e) => e.description(),
-            Error::InvalidResponse(msg) => msg.as_str(),
-            Error::Fault { message, .. } => message.as_str(),
-            Error::ConnectionNotUpgraded => "connection not upgraded",
-        }
-    }
-
-    fn cause(&self) -> Option<&dyn StdError> {
+    fn source(&self) -> Option<&(dyn StdError + 'static)> {
         match self {
             Error::SerdeJsonError(ref err) => Some(err),
             Error::Http(ref err) => Some(err),