feat: support OpenAPI 0.1.89 (constitutional committee + DRep query options)
- Bump @blockfrost/openapi 0.1.86 -> 0.1.89 - Add governance.committee, committeeVotes(All), committeeVotesById(All) - Add order_by/retired/expired query options to governance.dreps - Bump SDK version to 6.2.0 and update changelog Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>