message: package updates, adding prop-types package, using babel-preset-env instead of babel-preset-es2015
diff: ## Change Log
  +### v1.4.3 (2018/04/08)
  +- [#60](https://github.com/sapientglobalmarkets/react-querybuilder/pull/60) Fixed typescript function parameter definitions (@jakeboone02)
  +
  ### v1.4.2 (2018/03/02)
  - [#55](https://github.com/sapientglobalmarkets/react-querybuilder/pull/55) Add optional id information in README (@CharlyJazz)
  