Bump getrandom from 0.2.15 to 0.2.16

Bumps [getrandom](https://github.com/rust-random/getrandom) from 0.2.15 to 0.2.16.
- [Changelog](https://github.com/rust-random/getrandom/blob/master/CHANGELOG.md)
- [Commits](rust-random/getrandom@v0.2.15...v0.2.16)

---
updated-dependencies:
- dependency-name: getrandom
  dependency-version: 0.2.16
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]