feat: update api spec to V30 (#99)

* fix: make POST response on conversation model creation a 201

* feat: update version to v30.0

* feat(v30): add synonym sets api

* feat(v30): remove old synoym api

* add: analytics spec

* update: analytics spec for DELETE rule

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Co-authored-by: Harisaran G <[email protected]>

Author: tharropoulos