[Full Changelog](https://github.com/matrix-org/matrix-js-sdk/compare/v0.7.5-rc.1...v0.7.5-rc.2) * Use the device change notifications interface [\#348](https://github.com/matrix-org/matrix-js-sdk/pull/348) * Rewrite the device key query logic [\#347](https://github.com/matrix-org/matrix-js-sdk/pull/347)