feat: avoid body without destroying request

[Kikobeats]

The current source code implementation is aborting response body after the first chunk is received:

req.on('response', res => {
    response = res
    response.once('data', () => req.cancel())
  })

This is a very tricky way to avoid resolving the request body, and it will cause some undesirable behavior since the request was aborted abruptly.

Instead, we can setup range header to request the minimal quantity of body bytes. Could be possible the server doesn't support range requests, so we need to enable retry.

Perform a HEAD request is discarded since most of the servers disallow them.

[coveralls]

Pull Request Test Coverage Report for Build 3112749662

• 18 of 18 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 2337757094:	0.0%
Covered Lines:	63
Relevant Lines:	63

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💛 - Coveralls