fix(config): support snapshot config {timestamp: true} and {hash: true}

[SoonIter]

Summary

#6381 #6387

{ hash: true } { timestamp: true } and { timestamp: true, hash: true } should be three different behaviors.
I think this is a very misleading configuration.

https://webpack.js.org/configuration/other-options/#builddependencies

cases

{} and { timestamp: false, hash: false } -> { timestamp: false, hash: false }
{ hash: true } -> { timestamp: false, hash: true }
{ timestamp: true } -> { timestamp: true, hash: false }
{ timestamp: true, hash: true }

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[ahabhgk]

Thanks, bro