Build Tools: Don't use git for package installs.

While NPM supports installing packages from git locations, this requires `git` to be in the path, which won't necessarily be true, particularly on Windows.

We can download the release versions for these packages, instead.

Fixes #47916.


Built from https://develop.svn.wordpress.org/trunk@45875


git-svn-id: http://core.svn.wordpress.org/trunk@45686 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45874';
+$wp_version = '5.3-alpha-45875';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.