Changes
* PCBC-915: Fixed timestamp as expiry in mutation options (#88)
* PCBC-828: Implemented collection management (#89)
* PCBC-918: Extra attributes in ExistsResult now optional (deleted, expiry, flags, and sequenceNumber) (#95)
Notable changes in core C++
---------------------------
* CXXCBC-31: Allow to use schema-less connection strings (#394)
* CXXCBC-318: Always try TCP if UDP fails in DNS-SRV resolver (#390)
* CXXCBC-320: Negative expiry in atr can 'stuck' docs. (#393)
* CXXCBC-310: Improve shutdown of the LostTxnCleanup thread. (#389)