Support RegExp for hasQuery name

[mbrodala]

URI.hasQuery does not allow RegExp for parameter names like for values. The following would be a nice complement to the RegExp support in URI.removeQuery:

var uri = URI("http://example.org/?foo[bar]=1&foo[qux]=2");

uri.hasQuery(/^foo/); // true
uri.hasQuery(/^baz/); // false

[rodneyrehm]

feel free to send a PR for changing URI.hasQuery and its test accordingly

[mbrodala]

@rodneyrehm Should be straightforward, I'll give it a try.

[rodneyrehm]

thank you! :)