unpoller: 2.2.0 -> 2.3.1

[Frostman]

Description of changes

https://github.com/unpoller/unpoller/releases/tag/v2.3.0
https://github.com/unpoller/unpoller/releases/tag/v2.3.1

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[Frostman]

Result of nixpkgs-review pr 204668 run on x86_64-linux 1

1 package marked as broken and skipped:

• unifi-poller

1 package built:

• unpoller

[lukegb]

@ofborg test prometheus-exporters.unpoller

(we should really add this to passthru.tests...)