feat: 🔄 use StrictOmit

[Beraliv]

trafficstars

Hey 👋

I've seen that Omit usage was removed here – https://github.com/final-form/react-final-form/pull/589

I was interested whether you want to use builtin Omit from typescript or use StrictOmit from ts-essentials which also checks if the property is in the object (before removing it)

If you prefer Omit to not use ts-essentials, I will adapt the PR to be able to get rid of ts-essentials

Refers to https://github.com/final-form/react-final-form/issues/765

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[gertdreyer]

@Beraliv Please use the built-in typescript Omit as per the recommendation https://github.com/final-form/react-final-form/pull/589#issuecomment-521011710

[Beraliv]

I'm happy to do it