import { kysely } from "https://deno.land/x/kysely_postgrs_js_dialect@v0.27.4/deps.ts";
const { AlterTableBuilder } = kysely;
See CreateTableBuilder.addForeignKeyConstraint
Unlike CreateTableBuilder.addForeignKeyConstraint this method returns
the constraint builder and doesn't take a callback as the last argument. This
is because you can only add one column per ALTER TABLE
query.