refactor(error): update Debug for Error to output 'hyper::Error'

Author: seanmonstar

src/error.rs

@@ -292,7 +292,7 @@ impl Error {
 
 impl fmt::Debug for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let mut f = f.debug_tuple("Error");
+        let mut f = f.debug_tuple("hyper::Error");
         f.field(&self.inner.kind);
         if let Some(ref cause) = self.inner.cause {
             f.field(cause);