• Updated all packages, besides eslint (8->9) because it was a pretty big update. I might do it later.
• Fix #286 - set defaultProps to undefined when it's not present in the original to not have the warning "Support for defaultProps will be removed from function components in a future major release" by @Hypnosphi. Thank you!
• Readme updates by myself @vzaidman and @sergeylaptev. Thank you!