Implement Diff for DateTime<Utc>

[emirror-de]

Dear Maintainer,

thanks for this nice crate! I do have the following situation:

#[derive(Diff, PartialEq, Eq)]
pub struct ExternalType {
    pub timestamp: Datetime<Utc>,
}

Are there any chances to support structs that contain external types?

Best regards,
Lewin

[benhall-7]

Heya @emirror-de! The way forward here in my opinion is to implement this behind a feature flag. There happens to be an example of this now, with the num crate. Then, whether to add it to the default features is up to opinion

[emirror-de]

Ah I see, thanks! I will have a look at this as soon as I have time for it :)