fix: import slice from util file

Author: frontman-git

src/diff/children.js

@@ -8,9 +8,10 @@ import {
 	UNDEFINED,
 	NULL
 } from '../constants';
-import { isArray } from '../util';
+import { isArray, slice } from '../util';
 import { getDomSibling } from '../component';
 
+
 /**
  * @typedef {import('../internal').ComponentChildren} ComponentChildren
  * @typedef {import('../internal').Component} Component