Bump discard from 1.1.0 to 1.2.0 (#13308)

Bumps [discard](https://github.com/jhawthorn/discard) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/jhawthorn/discard/releases)
- [Changelog](https://github.com/jhawthorn/discard/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jhawthorn/discard/commits

)

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