[Security] Bump smallvec from 0.6.7 to 0.6.10
[Security] Bump smallvec from 0.6.7 to 0.6.10

Bumps [smallvec](https://github.com/servo/rust-smallvec) from 0.6.7 to 0.6.10. **This update includes security fixes.**
- [Release notes](https://github.com/servo/rust-smallvec/releases)
- [Commits](https://github.com/servo/rust-smallvec/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
nrc/rustc-perf,nrc/rustc-perf,nrc/rustc-perf