[Feedback wanted] Return type for XREAD/XREADGROUP

[uki00a]

We now adopt Map as the return type for XREAD and XREADGROUP.
But I also think there are advantages of adopting Record over Map.
If you have an opinion about this, please leave a comment 😃

See also: #86

[tumile]

I think a Map here is a little overkill... Record is lighter, and we are only use string keys. For iterating, I don't see why a for..in loop is not sufficient...

[uki00a]

My concern was that Record would not be able to preserve the order of fields in the stream entry (The order of properties returned by for-in, Object.keys, etc. was not guaranteed until ES2020).

However, I believe that ES2020's 'for-in mechanics' proposal will wipe off this concern 😌

Therefore, I would like to adopt Record over Map 🤔