Fix error displ
For http status code in error
First split version
New status code, Basic auth from username:password in URI
Split tokio to separate deps
Support https:// instead of wss://
?Sized
impl From for Message
Tokio instead of tokio-core
rustc 1.28.0
OpenSSL 1.1.1
Add Send trait bounds to the Futures
One more pub entry, better async upgrade error, minor doc fixes
0.18.1