ocamlPackages.astring: 0.8.3 -> 0.8.5
ocamlPackages.astring: 0.8.3 -> 0.8.5

Since astring is a common dependency and the maintainance effort is
minimal (package dependencies and build system didn't change) we keep
the old 0.8.3 version around for OCaml < 4.05, since 0.8.4 requires a
minimum of OCaml 4.05.

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