add @Property to ContaintsStmts, to allow working with public property

Author: TomasVotruba

lib/PhpParser/Node/ContainsStmts.php

@@ -4,6 +4,9 @@
 
 namespace PhpParser\Node;
 
+/**
+ * @property Stmt[]|null $stmts
+ */
 interface ContainsStmts extends \PhpParser\Node {
     /**
      * @return Stmt[]