0.20.0

Release notes

Enhancements

• Added LiveClient::reconnect() and LiveClient::resubscribe() methods to make it easier
  to resume a live session after losing the connection to the live gateway
• Added subscriptions() and subscriptions_mut() getters to LiveClient for getting all
  active subscriptions
• Added shutdown() method to live::Protocol to clean up the active session
• Downgraded to tracing span level on LiveClient::next_record() to "debug" to reduce
  performance impact
• Added From<&[&str]> and From<[str; N]> implementations for Symbols

Breaking changes

• Changed LiveClient::close() to take &mut self rather than an owned value to self now
  that clients can be reused through the reconnect() method
• Changed LiveClient::subscribe() to take a Subscription parameter rather than a
  &Subscription because it will now store the Subscription struct internally
• Upgraded DBN version to 0.28.0:
  • Added CommoditySpot InstrumentClass variant and made InstrumentClass
    non-exhaustive to allow future additions without breaking changes