regenerate package-lock.json

[dotlambda]

Otherwise installation fails with

npm ERR! request to https://registry.npmjs.org/url-join failed: cache mode is 'only-if-cached' but no cached response is available.

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