message: Prepare changelog for v0.13.2
diff: +Changes in [0.13.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.13.2) (2018-08-23)
  +=====================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.13.1...v0.13.2)
  +
  + * Don't crash if the value of a room tag is null
  + [\#2135](https://github.com/matrix-org/matrix-react-sdk/pull/2135)
  +
  Changes in [0.13.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.13.1) (2018-08-20)
  =====================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.13.1-rc.1...v0.13.1)
  