Changes to Get news feed

added the new optional request property q

added the new optional request property categories

added the required property data/items/items/items/categories to the response with the 200 status

added the new optional request property end_date

added the new optional request property start_date

the request property cursor became optional

added the required property data/items/items/items/sentiment_score to the response with the 200 status

the response property nextCursor/published_at became optional for the status 200

added the new optional request property cursor/created_at

the request property cursor/published_at became optional

request property cursor/published_at deprecated

added the optional property nextCursor/created_at to the response with the 200 status

response property nextCursor/published_at deprecated

added the required property data/items/created_at to the response with the 200 status

added the required property data/items/items/items/created_at to the response with the 200 status