Allow any type for useForm transformation

[genezys]

Fix #1001

[wlepinski]

Quick question, any idea when this is going to be released?

[reinink]

Hey! Thanks so much for your interest in Inertia.js and for submitting this contribution.

In an attempt to get on top of the issues and pull requests on this project I am going through all the older issues and PRs and closing them, as there's a decent chance that they have since been resolved or are simply not relevant any longer. My hope is that with a "clean slate" me and the other project maintainers will be able to better keep on top of issues and PRs moving forward.

Of course there's a chance that this PR is still relevant, and if that's the case feel free to re-submit it. If it's a new feature and not a bug fix maybe respond here first to make sure that it's something we want to include in the library.

Really not trying to be dismissive here, I just need to find a way to get this project back into a state that I am able to maintain it. Hope that makes sense! ❤️