message: Prepare changelog for v0.13.6
diff: +Changes in [0.13.6](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.13.6) (2018-10-08)
  +=====================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.13.5...v0.13.6)
  +
  + * Fix resuming session in Firefox private mode/Tor browser being broken
  + [\#2195](https://github.com/matrix-org/matrix-react-sdk/pull/2195)
  + * Show warning about using lazy-loading/non-lazy-loading versions simultaneously (/app & /develop)
  + [\#2201](https://github.com/matrix-org/matrix-react-sdk/pull/2201)
  +
  Changes in [0.13.5](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.13.5) (2018-10-01)
  =====================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.13.5-rc.1...v0.13.5)
  