Returning `Tuple` from creation processes is ambiguous

[pebeto]

When someone calls a creation process in the repository layer, the returning value is denoted by Tuple{Optional{<:Int64},UpsertResult}. It means that the user is going to see:

(1, DearDiary.Created())

It must be now a NamedTuple{Optional{<:Int64},UpsertResult}, making possible to annotate the returning values.

(id=1, DearDiary.Created())

NamedTuple can be unpacked normally as a Tuple.

x, y = (a=1, b=2)

So there's no breaking change exposed here.

[pebeto]

Implemented in v0.2.1.