v1.6.0

• [PBE-000] add structure to client details (PR: #34, Author: @su225)
• [PBE-236] add call grants event (PR: #23, Author: @su225)
• [PBE-348] add participant_count field (PR: #41, Author: @su225)
• [PBE-348] include participant details in track published/unpublished (PR: #43, Author: @su225)
• [PBE-494] add anonymous participant count and started_at fields (PR: #94, Author: @su225)
• Update video openapi Spec (PR: #96, Author: @stream-ci-bot)
• Improve little stuff on CI (PR: #97, Author: @guerinoni)
• chore(release): v1.6.0 (PR: #98, Author: @github-actions[bot])