Add cacheable-lookup

[louislam]

Description

Follow up of #1823.

cacheable-lookup is a 5M weekly downloads library, I think it is more stable.

• As proxy and https are using custom agent, need to find a way to hook up cachable-lookup.

Type of change

Please delete any options that are not relevant.

• New feature (non-breaking change which adds functionality)

Checklist

• My code follows the style guidelines of this project
• I ran ESLint and other linters for modified files
• I have performed a self-review of my own code and tested it
• I have commented my code, particularly in hard-to-understand areas
  (including JSDoc for methods)
• My changes generate no new warnings
• My code needed automated testing. I have added them (this is optional task)

[louislam]

As it is not able to add to proxy http agent, this pr for non-proxy only.