Derive Deserialize for ValidationErrors

[Person-93]

Needed to change keys to String because the Deserializer can't provide &'static str

[Keats]

What is the usecase there? I'm expecting Validator to only ever serialize things

[Person-93]

@Keats I need it so that validation can be done on the server and error handling can be done on the client.

[Person-93]

I'm a bit confused by this error, is it a dependency that doesn't compile on the pinned toolchain?

[Keats]

I'm a bit confused by this error, is it a dependency that doesn't compile on the pinned toolchain?

Yes, this specific crate has caused issues across multiple crates :(

This change adds a lot of allocations so I'm not sure it makes sense in that state. Would a Cow<'static> work instead?

[Person-93]

Yes, it should work.
I was concerned that deserializing a Cow<str> would give it the lifetime of wherever it's derserialized from, but based on this issue it looks like it does not and there are no plans to change that.
I'll fix it.

[krojew]

Can you rebase your PR?

[Person-93]

Can you rebase your PR?

I've deleted my fork, but I looked around and found this commit which looks like it has all my changes. Feel free to clone it and open your own PR.