Motivation for this change

https://forum.teamspeak.com/threads/140245-Release-TeamSpeak-Client-3-3-0

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)

/nix/store/wk5ysdszlp5grxvza7k2gydhfnipn0ay-teamspeak-client-3.1.10	  876614360
/nix/store/670q6hssgayp366qwl00xvcgyc4q6jzp-teamspeak-client-3.3.0	  935881136

• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.