Is your feature request related to a problem? Please describe.

We use bigserial in Postgres for many primary keys. Typescript has a built in bigint type, but I can't use it with IdEntity:

export class Credential implements IdEntity<Credential> {
	@PrimaryKey({ type: 'bigint' })
	id!: bigint;
}

gives

Type 'Credential' does not satisfy the constraint '{ id: string | number; }'.
  Types of property 'id' are incompatible.
    Type 'bigint' is not assignable to type 'string | number'.ts(2344)

Describe the solution you'd like

Maybe an approach like UuidEntity would work here? Maybe BigIntIdEntity? Or maybe it'd be simple enough to just have id in IdEntity defined as id: number | string | bigint;?

Describe alternatives you've considered

I'm relatively new to Mikro ORM, so I'm not sure what a good alternative would be. We need to be able to define the entity so the database handles it as well as not overflowing the number type if it gets large enough.

Additional context

None needed that I can tell.