[#6437] Add versionadded directive

Author: wouterj

components/console/helpers/table.rst

@@ -66,6 +66,10 @@ You can add a table separator anywhere in the output by passing an instance of
     | 80-902734-1-6 | And Then There Were None | Agatha Christie  |
     +---------------+--------------------------+------------------+
 
+.. versionadded:: 3.1
+    The ``setColumnWidths()`` and ``setColumnWidth()`` methods were introduced
+    in Symfony 3.1.
+
 By default the width of the columns is calculated automatically based on their
 contents. Use the :method:`Symfony\\Component\\Console\\Helper\\Table::setColumnWidths`
 method to set the column widths explicitly::