ordered hash for JSON::Fast and META6

gistfile1.txt

#!/usr/bin/env raku

use v6;

use JSON::Fast;

class MyHash is Hash {
  my %w = (
     'first'          => '  ',
     'perl'           => ' a',
     'raku'           => ' b',
     'name'           => ' c',
     'auth'           => ' d',
     'version'        => ' e',
     'api'            => ' f',
     'description'    => ' g',
     'source-url'     => ' h',
     'tags'           => ' i',
     'authors'        => ' j',
     'license'        => ' k',
     'provides'       => ' l',
     'depends'        => ' m',
     'resources'      => ' n',
     'last'           => '~ ',
     'final'          => '~~',
  );
  sub by-weighted-keys {
    (%w{$^a.key} // $^a.key) cmp (%w{$^b.key} // $^b.key);
  }
  method sort( *$keys  --> Seq:D ) {
    return sort( &by-weighted-keys, self.pairs );
  }
}

my %x := MyHash.new: {
  "perl"        => "6.c",
  "name"        => "Vortex::TotalPerspective",
  "api"         => "1",
  "auth"        => "github:SomeAuthor",
  "version"     => "0.0.1",
  "description" => "Wonderful simulation to get some perspective.",
  "authors"     => [ "Your Name" ],
  "license"     => "Artistic-2.0",
  "provides"    => {
    "Vortex::TotalPerspective" => "lib/Vortex/TotalPerspective.rakumod"
   },
    "depends"       => [ ],
    "build-depends" => [ ],
    "test-depends"  => [ ],
    "resources"     => [ ],
    "tags"  => [
      "Vortex", "Total", "Perspective"
    ],
    "source-url" => "git=>//github.com/you/Vortex-TotalPerspective.git"
  };

say to-json( %x, :sorted-keys );