ably 2.20.0 on Node.js NPM

Full Changelog: 2.19.0...2.20.0

What's Changed

With this release, the ably-js LiveObjects API is no longer in Public Preview and is now generally available.

Key changes:

Introduce version 6 of the Ably protocol; add operation-specific payload fields to ObjectOperation and typed value fields to ObjectData exposed in LiveObjects subscription callbacks; deprecate map, counter, mapOp, counterOp on ObjectOperation and value on ObjectData #2159
Add support for partial sync of LiveObjects state #2152
Add support for server-initiated MAP_CLEAR object operation #2176
Return history function from useChannel hook #2177