There's a merged pull request on the void-packages repository

ytnef: update to 2.0.
https://github.com/void-linux/void-packages/pull/35517

Description:
- fix [CVE-2021-3403](https://nvd.nist.gov/vuln/detail/CVE-2021-3403)
- fix [CVE-2021-3404](https://nvd.nist.gov/vuln/detail/CVE-2021-3404)

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