Expose BaseUserTraits type

[charliemourant]

I want to build some of my own utilities around the identify function in my project. To ensure that other contributors only send identify events with traits used in my organisation's Segment setup, I would like to be able to limit the traits identify() is called with to a type like the MyOrgUserTraits below.

type MyOrgCustomTraits = {
    order_sku: string 
    ...
}

type MyOrgUserTraits = Partial<MyOrgCustomTraits> & BaseUserTraits

Currently I cannot do this because the Segment BaseUserTraits type is not exposed and the exposed UserTraits type includes an index signature type allowing any values.

Please could you expose the BaseUserTraits type :)