message: Updated CHANGELOG.md for version 3.9.3
diff: ## Change Log
  +### v3.9.3 (2021-02-05)
  +- [#179](https://github.com/sapientglobalmarkets/react-querybuilder/pull/179) Added ability to disable inital queryChange (@saurabhnemade)
  +
  ### v3.9.2 (2021-01-24)
  - [#178](https://github.com/sapientglobalmarkets/react-querybuilder/pull/178) Export default configs (@jakeboone02)
  - [#176](https://github.com/sapientglobalmarkets/react-querybuilder/pull/176) Remove unnecessary exclude pattern (@vitorhsb)
  