4.0.0 (2019-03-09)

BREAKING CHANGES

The codebase was migrated from Flowtype to TypeScript 🚀
It helps to improve the DX on this project for new contributors 😇

I found to publish a new MAJOR version more safety, cause our refactoring

• change build process (from babel -> typescript)
• automatically generates flowtype definitions (it may not work)

All credits to @AJRdev for amazing work!