v2.1.0-rc.1

Full Changelog

• Handle self read receipts for fixing e2e notification counts
  #974
• Add redacts field to event.toJSON
  #973
• Handle associated event send failures
  #972
• Remove irrelevant debug line from timeline handling
  #971
• Handle relations in encrypted rooms
  #969
• Relations endpoint support
  #967
• Disable event encryption for reactions
  #968
• Change the known safe room version to version 4
  #966
• Check for lazy-loading support in the spec versions instead
  #965
• Use camelCase instead of underscore
  #963
• Time out verification attempts after 10 minutes of inactivity
  #961
• Don't handle key verification requests which are immediately cancelled
  #962