Changes to Get Threat Feed Items (Beta)

removed the enum value clawhub from the query request parameter ecosystem

added the new optional query request parameter startAfterCursor

query request parameter page_cursor was deprecated

added the new enum value edge-extension to the query request parameter ecosystem

added the new enum value firefox-extension to the query request parameter ecosystem

added the new enum value vscode-extension to the query request parameter ecosystem

added the non-success response with the status 503

added the non-success response with the status 504

response property nextPageCursor deprecated

added the required property endCursor to the response with the 200 status