python3Packages.typer: disable failing tests on darwin
python3Packages.typer: disable failing tests on darwin

these all seem to stem from the shellingham package being unable to
detect the shell (even if we provide `ps` to it), likely related to
a known issue

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