message: Prepare changelog for v1.1.1
diff: +Changes in [1.1.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v1.1.1) (2019-05-14)
  +===================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v1.1.0...v1.1.1)
  +
  + * Fix registration with email
  + [\#2970](https://github.com/matrix-org/matrix-react-sdk/pull/2970)
  + * Fix bug where email was not required where it shouldn't have been
  + [\#2969](https://github.com/matrix-org/matrix-react-sdk/pull/2969)
  +
  Changes in [1.1.0](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v1.1.0) (2019-05-07)
  ===================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v1.1.0-rc.1...v1.1.0)
  