invoice object returns a Vec<Parcel> as type "parcel"

[bacongobbler]

Should these fields be made plural to match other fields?

bindle/src/invoice/mod.rs

Lines 79 to 81 in 9487388

	pub parcel: Option<Vec<Parcel>>,
	pub group: Option<Vec<Group>>,
	pub signature: Option<Vec<Signature>>,

IMO we should be listing these as "parcels", "groups", and "signatures" as we're dealing with a list of objects rather than a single object.

That being said, this would break backwards compatibility with older bindle clients.

I noticed this while updating bindle-dotnet to the newest bindle APIs.

[thomastaylor312]

We had it that way originally but changed our minds for a specific reason I can't remember. @technosophos do you remember?

[itowlson]

#34

[thomastaylor312]

Yeah that is where we changed it, but we had an "in person" discussion about why we were doing it