Bump github.com/in-toto/in-toto-golang from 0.3.2 to 0.3.3 (#459)

Bumps [github.com/in-toto/in-toto-golang](https://github.com/in-toto/in-toto-golang) from 0.3.2 to 0.3.3.
- [Release notes](https://github.com/in-toto/in-toto-golang/releases)
- [Changelog](https://github.com/in-toto/in-toto-golang/blob/master/CHANGELOG.md)
- [Commits](https://github.com/in-toto/in-toto-golang/compare/v0.3.2...v0.3.3

)

---
updated-dependencies:
- dependency-name: github.com/in-toto/in-toto-golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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