v3.0.6: handle reconnection notice automatically, allow automatic auth for market data if required

What's Changed

• feat(v3.0.6): handle reconnection notice automatically, allow authenticating for market data by @tiagosiebler in #142
• Detects & tags books-l2-tbt and books50-l2-tbt requests as "auth required". Automatically authenticates public connection when these topics are requested. Resolves #140.
• Automatically handle "connection will be closed soon for service upgrade" through automatic reconnect. Resolves #141.

Full Changelog: v3.0.5...v3.0.6