nixpkgs

b79f64b5 - chromium: 81.0.4044.129 -> 81.0.4044.138

chromium: 81.0.4044.129 -> 81.0.4044.138 https://chromereleases.googleblog.com/2020/05/stable-channel-update-for-desktop.html This update includes 3 security fixes. CVEs: CVE-2020-6831 CVE-2020-6464 (cherry picked from commit dec3d5f39f67dbb6254d139521005a0d5d306605)