Stop using deprecated API

[klippx]

There is a FIXME in src/gateway/http.js

    // FIXME: Deprecated API
    // eslint-disable-next-line n/no-deprecated-api
    const defaults = url.parse(this.request.url())

However, url.parse(this.request.url()) is not equal to new URL(this.request.url()). So changing this might not necessarily be as trivial as that (which is also confirmed by breaking the spec spec/node/gateway/http.spec.js).

    {
      urlParse: Url {
        auth: null,
        hash: null,
        host: 'example.org',
        hostname: 'example.org',
        href: 'http://example.org/api/examples.json'
        path: '/api/examples.json',
        pathname: '/api/examples.json',
        port: null,
        protocol: 'http:',
        query: null,
        search: null,
        slashes: true,
      },
      // missing keys: auth (which is used), hash, path (which is used), query (which is used)
      // new keys: origin, password, searchParams, username
      newUrl: URL { 
        hash: '' // used to be null
        host: 'example.org',
        hostname: 'example.org',
        href: 'http://example.org/api/examples.json',
        origin: 'http://example.org',
        password: '',
        pathname: '/api/examples.json',
        port: '', // used to be null
        protocol: 'http:',
        search: '', // used to be null
        searchParams: URLSearchParams {},
        username: '',
      }
    }