missing type definition for creating GIN indexes

[kukoo1]

What are you doing?

It's problem with typescript type definition.

There's neither "using" nor "operator" options in "ModelIndexesOptions" interface located in "types/lib/model.d.ts"

So it causes compilation error when designate indexes in model definition
example

{
            fields: ["firstName"],
            using: "gin",
            operator: "gin_trgm_ops",
}

There's no error using @types/sequelize

What do you expect to happen?

No error in typescript compilation

Dialect: postgres
Dialect version: XXX
Database version: PostgreSQL 10.7
Sequelize version: 5.7.0
Tested with latest release: Yes 5.7.0