Support PostgreSQL `jsonb` columns

[oXtxNt9U]

PostgreSQL has different data types for dealing with JSON. Using schemaless attributes, the resulting column is always of type json. But in almost all cases one wants to use jsonb over json when working with Postgres.

I saw this previous issue where someone asked something similar, but the answers given are a bit minimal:
#15

I'm not sure if it's supposed to be supported already. If it's already possible or there's a workaround using this package please let me know!

Otherwise, would it be possible to add support for this?
E.g. something like $table->schemalessAttributes('extra_attributes', [ 'type' => 'jsonb']).

Many thanks in advance.