Support query string query

[mooijtech]

Hello, Would it be possible to support a query string query with required must fields? References: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html

[Prounckk]

This would be amazing!

[Isan-Rivkin]

+1

[tuziben]

You could use CustomQuery

	queryString := map[string]interface{}{
		"query_string": map[string]interface{}{
			"query":            "(new york city) OR (big apple)",
			"analyze_wildcard": true,
		},
	}

	esquery.CustomQuery(queryString)