Update index.d.ts

[salisbury-espinosa]

append readonly (string | Raw)[] to column type of ReturningMethod

[lehni]

@salisbury-espinosa Just to understand, what situation does this change solve?

[salisbury-espinosa]

@salisbury-espinosa Just to understand, what situation does this change solve?

@lehni
model with readonly idColumn (see issue and PR ):

export default class SomeModel extends Model {
   static get idColumn() {
    return ['id'] as const;
  }
}

some logic:

 const insertedRow = await SomeModel.query()
    .insert(data)
    .returning(SomeModel.idColumn);

typecheck generates an error

=>

TS2345: Argument of type readonly ['id'] is not assignable to parameter of type string | Raw | (string | Raw)[]
The type readonly ['id'] is readonly and cannot be assigned to the mutable type (string | Raw)[]

this patch fixes it