Using `subnetMatch` in TypeScript?

Related to #94. The example given does not work for me:

const rangeList = {
  documentationOnly: [ ipaddr.parse('2001:db8::'), 32 ],
  tunnelProviders: [
    [ ipaddr.parse('2001:470::'), 32 ], // he.net
    [ ipaddr.parse('2001:5c0::'), 32 ]  // freenet6
  ]
};
ipaddr.subnetMatch(ipaddr.parse('2001:470:8:66::1'), rangeList, 'unknown'); // => "tunnelProviders"

But.. This works:

const rangeList: {
  documentationOnly: [ipaddr.IPv6|ipaddr.IPv4, number];
  tunnelProviders: [ipaddr.IPv6|ipaddr.IPv4, number][];
} = {
  documentationOnly: [ipaddr.parse('2001:db8::'), 32],
  tunnelProviders: [
    [ipaddr.parse('2001:470::'), 32], // he.net
    [ipaddr.parse('2001:5c0::'), 32]  // freenet6
  ]
};

ipaddr.subnetMatch(ipaddr.parse('2001:470:8:66::1'), rangeList, 'unknown'); // => "tunnelProviders"       

I'm not really sure if this is the cleanest solution. Also, it isn't copy/pastable for those using JavaScript instead of TypeScript.

Start with the subnetMatch example described here and the related issue #94, then inspect how the TypeScript types represent the range list. Done means the example works in TypeScript with an appropriate type explanation and remains copy/pastable for JavaScript users.