resolve E0599 when derived without importing trait into current scope

[colstrom]

Thanks for the time and effort you've put into this crate! ❤️

This fixes an issue when deriving Patch without importing the trait into the current scope.

As a quick illustration of the issue:

#[derive(::struct_patch::Patch)]
struct Data {}

fn main() {
}

This fails to compile with an error that goes something like this:

error[E0599]: no method named `apply` found for struct `Data` in the current scope

So this is just a tiny one-line change that fixes that. I assumed Semantic Versioning or something similar, and bumped the patch version accordingly, since there's no change in functionality or anything.

Also while checking that it all worked, I noticed a minor warning from cargo:

warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`

So I fixed that up too.

If you'd like me to change anything, just let me know! Thanks again for contributing something cool to the ecosystem!

[yanganto]

Thank you every much ❤️