added WildcardQuery docs

docs/Query/Wildcard.md

-# Wildcard Query
\ No newline at end of file
+# Wildcard query
+
+> More info about Wildcard query is in the [official elasticsearch docs][1]
+
+Matches documents that have fields matching a wildcard expression (not analyzed).
+
+Lets take an example to write a wildcard query with Elasticsearch DSL.
+
+```JSON
+{
+    "wildcard" : {
+        "user" : {
+            "value" : "ki*y"
+        },
+        "boost" : 2.0
+    }
+}
+```
+
+And now the query via DSL:
+
+```php
+
+$search = new Search();
+$wildcard= new WildcardQuery('user', 'ki*y', ["boost" => 2.0]);
+$search->addQuery($wildcard);
+$queryArray = $search->toArray();
+
+```
+
+
+[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-wildcard-query.html