Vulnerability roundup 9: elasticsearch-5.6.16: 1 advisory [6.5]

[search](https://search.nix.gsc.io/?q=elasticsearch&i=fosho&repos=NixOS-nixpkgs), [files](https://github.com/NixOS/nixpkgs/search?utf8=%E2%9C%93&q=elasticsearch+in%3Apath&type=Code)

* [ ] [CVE-2020-7019](https://nvd.nist.gov/vuln/detail/CVE-2020-7019) CVSSv3=6.5 (nixos-19.03)

Scanned versions: nixos-19.03: 715db89e7d3.

