From React recomendation: Replace UNSAFE_componentWillReceiveProps() You could:

Replace

UNSAFE_componentWillReceiveProps() {
     this.updateDate();
}

By

componentDidUpdate() {
     this.updateDate();
}

This is because the third party library is using componentWillReceiveProps - componentWillReceiveProps gets automatically renamed to UNSAFE_componentWillReceiveProps. This happens because those methods are now considered legacy code and React is deprecating that lifecycle method as well as others.

Unfortunately, their isn't an immediate solution.

• You can fork the code and update it yourself
• Start an issue on the code's GIT page and hope the update their maintainer fixes the issue.
• Find another library to do the same job.
• Write custom logic to do the same thing as the library
• Use the library and hope they fix it before it's deprecated by React.