rubygems: 2.6.10 -> 2.6.13
rubygems: 2.6.10 -> 2.6.13

Fixes a number of CVEs:

- a DNS request hijacking vulnerability. (CVE-2017-0902)
- an ANSI escape sequence vulnerability. (CVE-2017-0899)
- a DoS vulnerability in the query command. (CVE-2017-0900)
- a vulnerability in the gem installer that allowed a malicious gem to overwrite arbitrary files. (CVE-2017-0901)

NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs