React 17 and 18 support

[rdebeasi]

Hey Charles! This package currently supports React 16, and folks on newer versions of React get an error when they try to install it.

From package.json:

"peerDependencies": {
    "prop-types": "~15.7.2",
    "react": "^16.8.0",
    "react-dom": "^16.8.0"
}

Would it be possible to add support for React 17 and 18? Would it be helpful if I opened a pull request?

Thank you!