Request for Semantic Version Pinning

[Besler]

Is your feature request related to a problem? Please describe.

Not related to a problem.

Describe the solution you'd like

I would like to be able to use a semantic version pin of flake-utils in my project's flake.nix.

{
  description = "Example flake-utils pin";

  inputs = {
    nixpkgs.url = github:NixOS/nixpkgs/nixos-21.11;
    flake-utils.url = github:numtide/flake-utils/1.2.3;  # <-- See here
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let pkgs = nixpkgs.legacyPackages.${system}; in
      rec {
        packages = flake-utils.lib.flattenTree {
          hello = pkgs.hello;
          gitAndTools = pkgs.gitAndTools;
        };
        defaultPackage = packages.hello;
        apps.hello = flake-utils.lib.mkApp { drv = packages.hello; };
        defaultApp = apps.hello;
      }
    );
}

This would require a release cycle for flake-utils and pushing of git tags. See mach-nix for an example.

Describe alternatives you've considered

1) Not using version pinning. 2) Pinning to a git hash, inputs.flake-utils.url = github:numtide/flake-utils/12806d31a381e7cd169a6bac35590e7b36dc5fe5

Additional context

I might also be wrong and this is a stupid idea to begin with :)

[zimbatm]

Thanks for the push, I released v1.0.0