v2.4.0

This release focuses on adding schema/user/session operations, synchronous transaction flag handling, and fixes watcher panic.

Added

• Implemented all box.schema.user operations requests and sugar interface (#426).
• Implemented box.session.su request and sugar interface only for current session granting (#426).
• Defined ErrConcurrentSchemaUpdate constant for "concurrent schema update" error (#404).
  Now you can check this error with errors.Is(err, tarantool.ErrConcurrentSchemaUpdate).
• Implemented support for IPROTO_IS_SYNC flag in stream transactions, added IsSync(bool) method for BeginRequest/CommitRequest (#447).

Fixed

• Fixed panic when calling NewWatcher() during reconnection or after connection is closed (#438).