build(deps): bump euclid from 0.20.14 to 0.21.0
Bumps [euclid](https://github.com/servo/euclid) from 0.20.14 to 0.21.0. - [Release notes](https://github.com/servo/euclid/releases) - [Commits](https://github.com/servo/euclid/commits/v0.21.0) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
