May getValue response type be configurable

[gypapp]

I've come across a bit uncomfortable issue with getValue()

getValue(key) returns the corresponding API response in binary form only:

        return requests.get(url).content

Though I understand this is the most generic form, in this case, I would prefer to diverge from the original API and let the caller specify what type of response is expected. Mostly because it is just a matter of what property is used in the expression above and in case of json it results in some boilerplate code on the caller side.

As far as I understand from the docs a similar educated guess is done in Javascript version of this API:

Returns: Promise<(Object|String|Buffer)> - Returns a promise that resolves to an object, string or Buffer, depending on the MIME content type of the record.