1.21.0

New

• Enhanced Client Awareness (#638): Apollo iOS now sends the library name and version as metadata in the extensions key of each request. This Enhanced Client Awareness metric is collected in GraphOS along with the existing Client Awareness and general operation metrics.

Improvement

• Removed SQLite.swift dependency (#635): Removed the dependency on SQLite.swift and replaced it with direct interaction with the SQLite C API.

Fixed

• Fix possible data races in the WebSocketTransport (#636): Fixes possible data race issues in the subscriptions property inside of WebSocketTransport. Thank you to @tahirmt for the contribution.
• Fix cache reading of null list items (#3527): Null list items would previously generate a wrongType error if stored and read from the cache. This refactors the execution logic to correctly handle values from cache references in lists. See PR #637.