Fix types for changes in @types/unist

Author: wooorm

lib/contents.js

@@ -162,12 +162,12 @@ function one(node) {
   }
 
   let copy = extend({}, node)
-  delete copy.children
+  if ('children' in copy) delete copy.children
   delete copy.position
 
   copy = extend(true, {}, copy)
 
-  if (node.children) {
+  if ('children' in node) {
     // @ts-ignore Looks like a parent.
     copy.children = all(node.children)
   }

lib/search.js

@@ -41,7 +41,7 @@ const slugs = new Slugger()
  */
 export function search(root, expression, settings) {
   const skip = settings.skip && toExpression(settings.skip)
-  const parents = convert(settings.parents || root)
+  const parents = convert(settings.parents || ((d) => d === root))
   /** @type {Array.<SearchEntry>} */
   const map = []
   /** @type {number} */