rename hasChildren to countChildren

Signed-off-by: Andy Miller <rhuk@mac.com>

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v1.7.0-rc.12
+## mm/dd/2020
+
+1. [](#improved)
+    * Changed `Folder::hasChildren` to `Folder::countChildren`
+
 # v1.7.0-rc.11
 ## 05/14/2020
 

system/src/Grav/Common/Filesystem/Folder.php

@@ -488,9 +488,9 @@ abstract class Folder
      * Does a directory contain children
      *
      * @param string $directory
-     * @return bool
+     * @return int
      */
-    public static function hasChildren($directory) {
+    public static function countChildren($directory) {
         if (!is_dir($directory)) {
             return false;
         }