Bumps [downcast-rs](https://github.com/marcianx/downcast-rs) from 1.1.1 to 1.2.0. - [Release notes](https://github.com/marcianx/downcast-rs/releases) - [Changelog](https://github.com/marcianx/downcast-rs/blob/master/CHANGELOG.md) - [Commits](marcianx/downcast-rs@v1.1.1...v1.2.0) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>