leiningen: 2.9.5 -> 2.9.6

[yogsototh]

Motivation for this change

Upgrade leiningen to 2.9.6

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.

[r-rmcgibbo]

Result of nixpkgs-review pr 122960 at 11104d6 run on x86_64-linux 1

1 package built successfully:

• leiningen

2 suggestions:

• warning: fixup-phase

  fixupPhase should not be overridden, use postFixup instead.

  Near pkgs/development/tools/build-managers/leiningen/default.nix:35:3:

     |
  35 |   fixupPhase = ''
     |   ^
  

• warning: missing-phase-hooks

  installPhase should probably contain runHook preInstall and runHook postInstall.

  Near pkgs/development/tools/build-managers/leiningen/default.nix:29:3:

     |
  29 |   installPhase = ''
     |   ^