v0.9.0-rc.1

Full Changelog

• Modify addRoomToGroup to allow setting isPublic, create alias
  updateGroupRoomAssociation
  #567
• Expose more functionality of pushprocessor
  #565
• Function for working out notif trigger permission
  #566
• keep track of event ID and timestamp of decrypted messages
  #555
• Fix notifEvent computation
  #564
• Fix power level of sentinel members
  #563
• don't try to decrypt a redacted message (fixes element-hq/element-web#3744)
  #554
• Support room notifs
  #562
• Fix the glob-to-regex code
  #558