set default listener on ipv4 and ipv6 interfaces

[ssrahul96]

Relevant issues

Contributor checklist

• Provide tests for the changes (unless documentation-only)
• Documented any new features, CLI switches, etc. (if applicable)
  • Server --help output
  • README.md
  • doc/http-server.1 (use the same format as other entries)
• The pull request is being made against the master branch

Maintainer checklist

• Assign a version triage tag
• Approve tests if applicable

Ref : https://www.grouparoo.com/blog/node-js-and-ipv6

[github-actions]

This pull request has been inactive for 360 days

[indexzero]

+1 this appears to be the most permissive address that supports both IPv4 & IPv6. That said, we should add test/localhost.test.js that validates we can connect from:

127.0.0.1
localhost
::1