:matches() not parsed correctly

[cvrebert]

See :matches().

:not(.b) parses to:

{
  "type":"selectors",
  "nodes":[
    {
      "type":"selector",
      "nodes":[
        {
          "type":"nested-pseudo-class",
          "name":"not",
          "nodes":[
            {
              "type":"selector",
              "nodes":[
                {
                  "type":"class",
                  "name":"b"
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}

whereas :matches(.b) currently parses to:

{
  "type":"selectors",
  "nodes":[
    {
      "type":"selector",
      "nodes":[
        {
          "type":"pseudo-class",
          "name":"matches",
          "content":".b"
        }
      ]
    }
  ]
}