warning: methods called `new` usually return `Self`
  --> src/websocket/request.rs:12:5
   |
12 | /     pub fn new(method: Method) -> WebSocketRequestMessageBuilder {
13 | |         WebSocketRequestMessageBuilder {
14 | |             request: WebSocketRequestMessage {
15 | |                 verb: Some(method.to_string()),
...  |
18 | |         }
19 | |     }
   | |_____^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_ret_no_self
   = note: `#[warn(clippy::new_ret_no_self)]` on by default