[Full Changelog](https://github.com/matrix-org/matrix-js-sdk/compare/v9.3.0...v9.4.0-rc.1) * Fixes to support line 1 / 2 [\#1553](https://github.com/matrix-org/matrix-js-sdk/pull/1553) * Add API for listening to remote hold status, advertise VoIP V1 [\#1549](https://github.com/matrix-org/matrix-js-sdk/pull/1549) * A hangup from another client is still valid [\#1555](https://github.com/matrix-org/matrix-js-sdk/pull/1555) * Remove temporary build step for tests [\#1554](https://github.com/matrix-org/matrix-js-sdk/pull/1554) * Move browser build steps to prepublish only [\#1552](https://github.com/matrix-org/matrix-js-sdk/pull/1552) * Extend getSsoLoginUrl for MSC2858 [\#1541](https://github.com/matrix-org/matrix-js-sdk/pull/1541)