@NonNull
    public static Single<Response> patchRequest(final String uri, final Parameters headers) {
        return request("PATCH", uri, null, headers, null);
    }
PATCH HTTP request

@param uri     the URI to request
@param headers the headers to add to the request
@return a Single with the HTTP response, or an IOException
main/src/main/java/cgeo/geocaching/network/Network.java