[Security] Bump http from 0.1.17 to 0.1.21 (#107)
[Security] Bump http from 0.1.17 to 0.1.21 (#107)

Bumps [http](https://github.com/hyperium/http) from 0.1.17 to 0.1.21. **This update includes security fixes.**
- [Release notes](https://github.com/hyperium/http/releases)
- [Changelog](https://github.com/hyperium/http/blob/v0.1.21/CHANGELOG.md)
- [Commits](https://github.com/hyperium/http/compare/v0.1.17...v0.1.21)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: Daithi O Crualaoich <da31e10cc11e7b9b455e98b480874bc53b0dc4c3@users.noreply.github.com>

woofwoofinc/cargo-sphinx,woofwoofinc/cargo-sphinx