message: chore: update changelog regarding source maps inclusion
diff: - Thanks to [@OmarTawfik](https://github.com/OmarTawfik) :thumbsup
  +- [Include source maps and original \*.ts sources in npm package](https://github.com/SAP/chevrotain/issues/1167)
  +
  #### Bug Fixes
  - [Literal single token character "ignore case" flag bug.](https://github.com/SAP/chevrotain/issues/1141)
  