New feature : Option to add leading "?"

Would you be open to PR for adding following option?

Example:

let params = {
"foo": bar
}
const url = `http://abc.com/xyz${stringify(params,{separator:true}})`
//prints http://abc.com/xyz?foo=bar

with falsy params

let params = undefined;
const url = `http://abc.com/xyz${stringify(params,{seperator:true})`
//prints http://abc.com/xyz

Rationale: Avoid ternary checks like this everywhere:

const url = params? 'http://abc.com/xyz?${stringify(params)' : 'http://abc.com/xyz'

[sindresorhus]

I think it would be better to add a method that does the inverse of .parseUrl().

[imaegoo]

+1

My case:

const obj = {url: 'https://foo.bar', query: {foo: ['bar', 'baz']}}
const options = {arrayFormat: 'bracket'}
queryString.stringifyUrl(obj, options)
//=> 'https://foo.bar?foo[]=bar&foo[]=baz'