Log Message:
v2.2.1
======
- Add support for Protocol Buffers 3
- Add View support (without DDL)
- Implement get_default_schema() method in BaseSchema
- DevAPI: Per ReplicaSet SQL execution
- DevAPI: XSession accepts a list of routers
- DevAPI: Define action on adding empty list of documents
- BUG23729357: Fix fetching BIT datatype
- BUG23583381: Add who_am_i and am_i_real methods to DatabaseObject
- BUG23568257: Add fetch_one method to mysqlx.result
- BUG23550743: Add close method to XSession and NodeSession
- BUG23550057: Add support for URI as connection data