feat: add support for using alias in 'is' method

[willamesoares]

Overview

This adds support for using aliases in the parser.is method.
Requested in #389

Test

// window.navigation.userAgent is:
// "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299"

const Bowser = require("bowser");
console.log(Bowser.getParser(window.navigation.userAgent).is('edge', true));

outputs

true

[coveralls]

Pull Request Test Coverage Report for Build 960

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 90.53%

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Totals
Change from base Build 948:	0.01%
Covered Lines:	577
Relevant Lines:	589

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💛 - Coveralls

[lancedikson]

Thanks, @willamesoares! A great improvement! 💪

[lancedikson]

It's been released in 2.11.0 🎉