feature request: Enum type with key/values

[audiolion]

Feature request

Ability to pass key/value pairs to Enum

Use case(s)

Creating an enum of error response codes:

Enum({ JWT_INVALID: 31003, JWT_EXPIRED: 31004 });

The current implementation of Enum just mirrors the string, but if I am trying to type some other value, like a number, I can't create a nice readable mapping e.g.

if (errorCode === Errors.JWT_INVALID) // do something