Fix console output render for show command (#1430)

Resolves: #1401

poetry/console/commands/show.py

@@ -86,7 +86,7 @@ lists all packages available."""
             ]
             ]
 
 
             table.add_rows(rows)
             table.add_rows(rows)
-            table.render()
+            table.render(self.io)
 
 
             if pkg.requires:
             if pkg.requires:
                 self.line("")
                 self.line("")