Build/Test Tools: Update more NPM packages

This updates two NPM packages:
- `qunit` from `2.13.0` to `2.14.0`.
- `sinon` from `9.2.2` to `9.2.3`.

See #51801.
Built from https://develop.svn.wordpress.org/trunk@49990


git-svn-id: http://core.svn.wordpress.org/trunk@49691 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-49989';
+$wp_version = '5.7-alpha-49990';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.