message: docs: changelog before release
diff: +## X.Y.Z (INSERT_DATE_HERE)
  +
  +#### Minor Changes
  +
  +- [Support multiple longer_alt tokens](https://github.com/Chevrotain/chevrotain/issues/1602)
  + - Thanks to [@msujew](https://github.com/msujew) :thumbsup
  +
  ## 9.0.2 (6-13-2021)
  #### Bug Fixes
  