Changes to Search products by keyword with full-text search

the response property meta/diagnostic/rate_limit_remaining became nullable for the status 200

the endpoint scheme security BearerAuth was removed from the API

added the non-success response with the status 400

removed the non-success response with the status 401

added the optional property search_mode to the response with the 200 status

added the new optional query request parameter deliver_to

added the new optional query request parameter include_unshippable

added the new optional query request parameter query

added the media type application/json for the response with the status 200