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

chromium: update to 78.0.3904.87.
https://github.com/void-linux/void-packages/pull/16037

Description:
- Addresses CVE-2019-13721, CVE-2019-13720:

    https://chromereleases.googleblog.com/2019/10/stable-channel-update-for-desktop_31.html

- Built for x86_64, i686, x86_64.
- Tested on x86_64.