Add Umlauts in text field for alphanumeric

Hello, when using the Alphanumeric text format Umlauts are not allowed. I worked around it by changing the regex for “$.validator.addMethod(“alphanumeric”, function(value, element)” to “/^[A-Za-z0-9 \-_.\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF]+$/i”

Maybe this could go into the plugin, since it is better for international use. And with every update my changes would be kicked out.