Update fork and support business latency requirements

[ashleyelder]

• catches up on 6 years worth of updates from upstream: https://github.com/likexian/whois#
• adds backwards compatible update to support more strict timeouts on operations: 6b73da0
  • (our org requires 1 second timeout for reading and writing, which may be the reason this fork was created in the first place
  • I found the 1 second timeout change was the only difference we had from upstream 6 years ago: https://github.com/mailgun/whois-go/pull/1/files)
• fixes build/linting errors
  • upstream actually has a red build that hasn't be resolved in 6 mos. IMO it may one day be worth evaluating maintaining our own whois-go rather than depend on an unreliable system

---

usage that will be applied to domain-analysis:

client := NewClient()
client.SetAbsoluteTimeout(true)  
client.SetTimeout(1 * time.Second)

[ashleyelder]

sorry, this probably should have been a single initial PR just to update this fork. that said, the functional change i made to make it match business requirements was only one small commit change

[vtopc]

Do we need this?

[vtopc]

... for module github.com/mailgun/whois-go

[roaet]

nit-grammar: "you can directly using"

[roaet]

note: we've been avoiding -u for a variety of reasons.