v3.0.0

Highlights

• Fix the 'transaction in progress' error when there was an attempt to perform multiple transactions
  in parallel. This will no longer throw an error, instead the transactions will be queued and performed
  serially one after another.

Breaking changes

• Added the missing MLS error case OrphanWelcome.

Bug Fixes

• expose OrphanWelcome to clients [WPB-14954] (530b2e4)
• silence verbose logs when performing a transaction [WPB-14953] (b13553d)
• don't swallow transaction errors if they don't originate from the closure [WPB-14895] (124b8a7)
• wait for current transaction to finish when creating a new one [WPB-14895] (73b9d52)

Testing

• parallel transactions are performed serially (ccc0b32)