Update types on @DefinitelyTyped

[SteinerPascal]

Hi, First of all, thanks for this super cool parser/serializer. I have seen that you added the possibility to add the option 'pathOnly' for the parser. I'm using TS and rely therefore on the typings of @DefinitelyTyped. The newest version there is 2 years ago and v. 3.1.3. What would need to be done to update this to the newest version? I would be willing to help here.