Update list of utilities

readme.md

@@ -449,8 +449,7 @@ unist:
 * [`unist-util-find-before`](https://github.com/syntax-tree/unist-util-find-before)
  — Find a node before another node
 * [`unist-util-flat-filter`](https://github.com/unicorn-utterances/unist-util-flat-filter)
- — Create a new tree with all nodes that pass the given function without
- references to the parent
+ — Flat map version of `unist-util-filter`
 * [`unist-util-flatmap`](https://gitlab.com/staltz/unist-util-flatmap)
  — Create a new tree by expanding a node into many
 * [`unist-util-generated`](https://github.com/syntax-tree/unist-util-generated)
@@ -469,6 +468,8 @@ unist:
  — `parent` references on nodes
 * [`unist-util-position`](https://github.com/syntax-tree/unist-util-position)
  — Get positional info of nodes
+* [`unist-util-reduce`](https://github.com/GenerousLabs/unist-util-reduce)
+ — Recursively reduce a tree
 * [`unist-util-remove`](https://github.com/syntax-tree/unist-util-remove)
  — Remove nodes from trees
 * [`unist-util-remove-position`](https://github.com/syntax-tree/unist-util-remove-position)