Motivation for this change

hasql-pool was marked as broken because of failing tests. The test suite requires running a database server, which is done upstream.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • [ x ] other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• [ currently none, as it was marked as broken ] Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• [ none, as it's a library ] Tested execution of all binary files (usually in ./result/bin/)
• [ no change ] Determined the impact on package closure size (by running nix path-info -S before and after)
• [ no change ] Ensured that relevant documentation is up to date
• [ x ] Fits CONTRIBUTING.md.