chore(travis): set minimum rust version

src/http/h1/decode.rs

@@ -458,7 +458,7 @@ mod tests {
         let content_len = content.len();
         for block_at in 0..content_len {
             let actual = read_async(decoder.clone(), content.as_bytes(), block_at);
-            assert_eq!(expected, &actual, "Failed async. Blocking at {}", block_at);
+            assert_eq!(expected, &actual) //, "Failed async. Blocking at {}", block_at);
         }
     }
 

src/http/mod.rs

@@ -131,7 +131,7 @@ pub trait Http1Transaction {
     fn should_set_length(head: &MessageHead<Self::Outgoing>) -> bool;
 }
 
-type ParseResult<T> = ::Result<Option<(MessageHead<T>, usize)>>;
+pub type ParseResult<T> = ::Result<Option<(MessageHead<T>, usize)>>;
 
 struct DebugTruncate<'a>(&'a [u8]);