Docblock to post() is too specific (array)

[olleharstedt]

Docblock to post():

    /**
     * Make a post request with optional post data.
     *
     * @param string $url  The url to make the post request
     * @param array  $data Post data to pass to the url
     * @param boolean $asJson Whether the data should be passed as json or not. {@insce 2.2.1}
     * @return self
     */

but then preparePayload accepts

    /**
     * @param array|object|string $data
     */

for $data. Can we update post() with this signature too? Right now, Psalm shows an error because of it.