v19.6.0

✨ Features

• Add a property aggregating all names of a NamespacedValue (#2656).
• Implementation of MSC3824 to add action= param on SSO login (#2398). Contributed by @hughns.
• Add invited_count and joined_count to sliding sync room responses. (#2628).
• Base support for MSC3847: Ignore invites with policy rooms (#2626). Contributed by @Yoric.

🐛 Bug Fixes

• Fix handling of remote echoes doubling up (#2639). Fixes #2618.