Add a sortQueryParameters option

[IvanSanchez]

normalize-url sorts query parameters by default, but that's a normalization that changes semantics, and is breaking some of my uses cases.

Thus, this PR adds a new option, sortQueryParameters, which defaults to true, plus unit tests.

[stevenvachon]

The sort algorithm only sorts the param names, and does not affect value order:

nomalizeUrl('http://host/?p1=value2&p2=value&p1=value1')
//-> http://host?p1=value2&p1=value1&p2=value

This should not affect any semantics and is almost spec-compliant (doesn't use code points).

[liweinan0423]

@stevenvachon sometimes we do not want the order of the query parameters to be changed. For example, when building a search result page, we ofter want to put the query parameter page=2 as the last parameter in the URL.