cli11: 1.9.1 -> 2.2.0
cli11: 1.9.1 -> 2.2.0

Major release needed for the latest `micromamba` release. Breaking
changes are few, though:
https://github.com/CLIUtils/CLI11/blob/main/CHANGELOG.md

Also add catch2 which is required for compiling and running the tests

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