Typing support for React 18

Types are updated for proper React 18 support — thanks, @utkuturna!

Also, bunch of security-related dependency updates.

New Contributors

• @utkuturna made their first contribution in #28

Full Changelog: v1.2.0...v1.3.0

Safe lifecycle methods

No longer uses componentWillMount internally.

Rewritten in TypeScript

The whole source code is now written in TypeScript, and the generated JS files are targeted to ES6*.

The functionality is exactly the same as before.

*If you need to target browsers that only support ES5 or earlier, you need to explicitly transpile the files in your node_modules/react-hide-show-utils.

Simple server-side support

Any children declared inside the components will simple render to null on Node. Basically, the components won't break on the server anymore.

On the client, everything works exactly like before.

Added `<ShowAt>` component

Finally both <HideAt> and <ShowAt> components are available.

Also, added notes and clarifications about its usage and limitations.