Adds "accepted" options

[yuric18]

In some cases, for example, a 404 Not Found response, maybe another retry should not be the best thing to do, because probably the second request will give 404 again. With that, you can lose some performance.

So, I decided to add a new option called "accepted" that will reject immediately the request if the HTTP Status Code is included in the option.accepted (Array of Number), improving performance.

I also fixed some ESLINT errors on index.

[coveralls]

Pull Request Test Coverage Report for Build 33

• 12 of 12 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 98.551%

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Totals
Change from base Build 22:	0.2%
Covered Lines:	45
Relevant Lines:	45

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💛 - Coveralls

[void666]

Thank you for the contribution. Changes looks good to me! 👍