fix: invocation proof order

[alanshaw]

resolves #201

This PR fixes the proof order in valid invocation fixtures. It also adds a time field - a Unix timestamp in seconds at which the validation should occur.

refs alanshaw/ucantone#2

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[Gozala]

I'll integrate this into rs-ucan to verify it works as expected and provide feedback based on findings (I'm not good at parsing cbor in base64 encoded with my eyes 😅)

[Gozala]

Looks good and rust implementation is in compliance with it now 🎉

Thanks @alanshaw

[Gozala]

@alanshaw I think branch protection rules prevent merges unless commits are signed, you may want to update your git config so it signs commits I'll amend this one to unblock and merge

[Gozala]

@alanshaw I think branch protection rules prevent merges unless commits are signed, you may want to update your git config so it signs commits I'll amend this one to unblock and merge

Actually I can not do that because PR is from your repo and I don't have commit rights to it, so I think you may need to do this

[alanshaw]

@Gozala all good now?