doc: add history for url.parse

PR-URL: #18685
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>

Author: styfle

doc/api/url.md

@@ -1030,6 +1030,11 @@ The formatting process operates as follows:
 ### url.parse(urlString[, parseQueryString[, slashesDenoteHost]])
 <!-- YAML
 added: v0.1.25
+changes:
+  - version: v9.0.0
+    pr-url: https://github.com/nodejs/node/pull/13606
+    description: The `search` property on the returned URL object is now `null`
+                 when no query string is present.
 -->
 
 * `urlString` {string} The URL string to parse.