docs: make public properties deprecated

No need to be public.

Author: kenjis

system/CLI/CLI.php

@@ -42,13 +42,17 @@ class CLI
      * Is the readline library on the system?
      *
      * @var bool
+     *
+     * @deprecated 4.4.2 Should be protected.
      */
     public static $readline_support = false;
 
     /**
      * The message displayed at prompts.
      *
      * @var string
+     *
+     * @deprecated 4.4.2 Should be protected.
      */
     public static $wait_msg = 'Press any key to continue...';
 

user_guide_src/source/changelogs/v4.4.2.rst

@@ -32,6 +32,8 @@ Deprecations
 - **Filters:** The Auto-Discovery for Filters and ``Filters::discoverFilters()``
   is deprecated. Use :ref:`registrars` instead. See :ref:`modules-filters` for
   details.
+- **CLI:** The public property ``CLI::$readline_support`` and ``CLI::$wait_msg``
+  are deprecated. These methods will be protected.
 
 Bugs Fixed
 **********