Add descriptions for ScopeInfo properties

Author: sirbrillig

VariableAnalysis/Lib/ScopeInfo.php

@@ -7,11 +7,15 @@
  */
 class ScopeInfo {
   /**
+   * The token index of the start of this scope.
+   *
    * @var int
    */
   public $owner;
 
   /**
+   * The variables defined in this scope.
+   *
    * @var VariableInfo[]
    */
   public $variables = [];