support removing attributes from animated elements

[LoganDark]

Why

inert does not accept inert='', inert='false', inert='undefined' or etc. The attribute must be entirely removed in order to enable the element again. disabled works the same way.

What

If a value resolves to undefined (not null or false or otherwise) its attribute will now be entirely removed.

Checklist

• Ready to be merged

[changeset-bot]

🦋 Changeset detected

Latest commit: 66bf995

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@react-spring/web	Patch
@react-spring/animated	Patch
@react-spring/core	Patch
@react-spring/parallax	Patch
@react-spring/rafz	Patch
@react-spring/shared	Patch
@react-spring/types	Patch
@react-spring/konva	Patch
@react-spring/native	Patch
@react-spring/three	Patch
@react-spring/zdog	Patch

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Name	Status	Preview	Updated (UTC)
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[joshuaellis]

Before we can evaluate on this being the right thing to do properly, can we add a couple of test cases to animated.test.tsx that shows this working please? :)

[LoganDark]

I suppose right now it's impossible for a spring value to even be null or undefined without an interpolation (at least when using useSpring), because of #2295. I'm off work for the week, so I can look into this more next Monday (especially since writing brand new tests will probably require me to clone/install everything anyway).

[joshuaellis]

@LoganDark can you rebase this please? :)

[LoganDark]

oh oops I didn't realize I had another PR open, lmao, one moment

[LoganDark]

looks like I can't reopen this without making a new one so I will make a new one

[LoganDark]

#2319