CodeIgniter 4 problem installing with composer

Code:
  PS C:\Users\PuercoRico> cd D:\xampp\htdocs

PS D:\xampp\htdocs> composer create-project codeigniter4/appstarter ci4 -s rc

Installing codeigniter4/appstarter (4.0.0-rc.4)

  - Installing codeigniter4/appstarter (4.0.0-rc.4): Loading from cache

Created project in ci4

Loading composer repositories with package information

Updating dependencies (including require-dev)

Your requirements could not be resolved to an installable set of packages.



  Problem 1

    - codeigniter4/framework v4.0.0-rc.3 requires ext-intl * -> the requested PHP extension intl is missing from your system.

    - codeigniter4/framework v4.0.0-rc.2.1 requires ext-intl * -> the requested PHP extension intl is missing from your system.

    - codeigniter4/framework v4.0.0-rc.2 requires ext-intl * -> the requested PHP extension intl is missing from your system.

    - codeigniter4/framework v4.0.0-rc.1 requires ext-intl * -> the requested PHP extension intl is missing from your system.

    - codeigniter4/framework 4.0.0-rc.4 requires ext-intl * -> the requested PHP extension intl is missing from your system.

    - Installation request for codeigniter4/framework ^4@rc -> satisfiable by codeigniter4/framework[4.0.0-rc.4, v4.0.0-rc.1, v4.0.0-rc.2, v4.0.0-rc.2.1, v4.0.0-rc.3].



  To enable extensions, verify that they are enabled in your .ini files:

    - D:\xampp\php\php.ini

  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.