TypeScript types for exceptions

[ides15]

Is your feature request related to a problem? Please describe.
I'd like to have better type safety on exceptions thrown by node-rfc. At the moment, I have to parse these exceptions by hand.

Describe the solution you'd like
Export the possible types for exceptions from node-rfc (This commit looks like what I want, don't think it has been published in a release yet).

• Edit: I also noticed these lines, these are string literals (not a TypeScript string type); not sure if this is intentional but I would think the types should be:

    export interface INodeRfcError {
        name: "nodeRfcError";
  -     message: "string";
  +     message: string;
  -     rfmPath?: "string";
  +     rfmPath?: string;
    }
  

Describe alternatives you've considered
Building these types myself.

Additional context
n/a