feat!: support React19 & drop React 16,17 support

[koba04]

This only updates CI settings and tests. react-transition-group seems to work with React 19 without any updates

[ddtch]

someone please pay attention to this PR

[jquense]

its in draft and not passing CI @ddtch what do you want us to pay attention to??

@koba04 lmk when this is updated to pass CI

[koba04]

better to skip it conditionally based on React version

[koba04]

@jquense
Yeah, CI fails are caused because of old dependencies and the Node version, and react-transition-group works with React v19 as long as we use nodeRef, so I think this doesn't block anything.

I'd say we should update our build settings , outdated dependencies and documentation system before updating React version.

[jquense]

you wanna do it?

[koba04]

Yeah, I'll do it when I have time, but it would be helpful someone takes that.

The documentation also depends on PropTypes, which was removed in v19, so it would be better to update the documentation as well.
(Keeping PropTypes won't have any issues, it's just ignored, so this isn't a requirement)

https://react.dev/blog/2024/04/25/react-19-upgrade-guide#removed-deprecated-react-apis

[sergioviniciuss]

it would be so helpful if this MR would be included soon🙏

[koba04]

@sergioviniciuss
I think react-transition-group works with React v19, do you have any issue that this can fix?

[danielstclair]

@koba04 I'm seeing an issue when using the Transition component on React v19:

TypeError: react_dom__WEBPACK_IMPORTED_MODULE_3___default(...).findDOMNode is not a function

[samin15]

@koba04 I'm seeing an issue when using the Transition component on React v19:

TypeError: react_dom__WEBPACK_IMPORTED_MODULE_3___default(...).findDOMNode is not a function

You need to add a ref and it'll work like this:
<CSSTransition nodeRef={nodeRef} . . </CSSTransition>

This will make it not crash but it will still fail on typing through eslint, so you might want to disable it for that.