Support `interval` type

[isaacharrisholt]

Now that we have gleam_time Squirrel could support the interval type by converting to and from microseconds, which is the resolution at which Postgres stores intervals.

This might require a new microseconds function in gleam/time/duration, but I wanted to get your opinion on supporting interval before I open an issue (so we have a use case I can point to).

[giacomocavalieri]

Hello Isaac, this will have to wait until pog has support for Postgres' time types! When they are added to pog it wouldn't be that hard supporting those from Squirrel I think :)

[ninanomenon]

I just run into this limitation too :D If I understand it correctly pog supports postgres time types now.

[giacomocavalieri]

Hello! Yes, pog now supports timestamps, but I don't think it supports gleam_time's duration. I will open an issue in the pog repo so that it can add support for that; then I would be able to add it to squirrel as well!

edit: Isaac beat me to it lpil/pog#67 😁