(BREAKING CHANGE) Allow a success result have access to its use case

[serradura]

• Update README (https://github.com/serradura/u-case/blob/v2.x/README.md#what-are-the-default-result-types)
• Allow a success result have access to its use case
• (BREAKING CHANGE) Pass the use_case object as the second argument of Micro::Case::Result#on_success() hook.

👆 Now, you can't use kwargs to decompose the result hash data into on_success block argument.

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Thanks, @lunks, @rinaldifonseca for helping me to elaborate on this idea.