Array format in query string parameters

[javierbrea]

Currently, when passing an array to a query string parameter it is always stringified as a list separated by commas.

It is desirable that this behavior can be configured to use another array formats, such as in the query-string npm package

For doing this, a new configuration option called queryStringArrayFormat could be added:

import { Api } from "@xbyorange/mercury-api";

const myApi =  new Api("/foo-url", {
  queryStringArrayFormat: "none"
});

fooApi.query({
  queryString: { foo: [1, 2, 3] }
}).read();

//=> 'foo=1,2'

Available formats could be the same than in the query-string npm package:

• 'bracket': Serialize arrays using bracket representation:

//=> 'foo[]=1&foo[]=2&foo[]=3'

• 'index': Serialize arrays using index representation:

//=> 'foo[0]=1&foo[1]=2&foo[3]=3'

• 'comma': Serialize arrays by separating elements with comma (default behavior until next major version for maintaining retrocompatibility):

//=> 'foo=1,2,3'

• 'none': Serialize arrays by using duplicate keys (default behavior in next major version):

//=> 'foo=1&foo=2&foo=3'