4.0.1

4.0.1

• FIX: Cache whether an element is or has a matching descendant when matching :has() to avoid quadratic time
  on deeply nested documents.
• FIX: Cache whether the parent matches when matching the child combinator (a > b) so it is matched once for
  all of its children, avoiding quadratic time when the parent is expensive, such as div:has(> p) > span.