[Full Changelog](https://github.com/matrix-org/matrix-js-sdk/compare/v0.10.5...v0.10.6-rc.1) * Expose event decryption error via Event.decrypted event [\#665](https://github.com/matrix-org/matrix-js-sdk/pull/665) * Add decryption error codes to base.DecryptionError [\#663](https://github.com/matrix-org/matrix-js-sdk/pull/663)