libpaper: 1.1.24 -> 1.1.28

[bobvanderlinden]

Motivation for this change

debian testing is on 1.1.28.

It seems pkgs.ted is failing to compile. I thought this might have something to do with it. My laptop isn't that fast, so ted is still building locally, but it seems to be further along than it did before this change. If ted builds successfully, this change needs to be part of 20.09: #97479

Build of ted is still failing.

I tested this PR by building ted:

nix-build -A pkgs.ted

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
  • 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 nixpkgs-review --run "nixpkgs-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)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.