Changed stream negotiation order in escalus_connection:start.
Changed stream negotiation order in escalus_connection:start.

According to XEP-0170:
"it seems safest to negotiate stream compression after negotiation of both TLS (to safely complete the negotiation) and SASL (to prevent certain denial-of-service attacks)"
so looks like it's better to put maybe_use_compression step after authenticate.

esl/escalus