Type of options in Producer/Consumer constructor

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The Readme mentions the other options from the nsqjs Reader/Writer being available in the second argument of the Producer constructor.

However, the actual typescript type does not reflect this, which leads to a type error if you try to provide more options. This could probably be solved most easily by exporting a type intersected with the nsqjs ConnectionConfigOptions type.

The only downside would be adding @types/nsqjs as a (dev?) dependency to this library. Alternatively, the option definintion could be duplicated, but that seems less than ideal.