How to set the SVG version in Apache Batik

Question

Using Apache Batik to create SVG files, the version always comes out as "1.0" (seems to be hard coded) but Batik says it implements 1.1. How do I change the version, is it as simple as setting the attribute manually on the <svg> element or would that have other consequences? Or does the SVG version not matter? I used an SVG validator and it recommended setting the version to 1.1 or omitting it.

import java.io.IOException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.batik.anim.dom.SVGDOMImplementation;
import org.w3c.dom.*;
import org.w3c.dom.svg.SVGDocument;

public class Test {
    public static void main(String[] args) throws IOException, TransformerException {
        DOMImplementation imp = SVGDOMImplementation.getDOMImplementation();
        SVGDocument doc = (SVGDocument) imp.createDocument(SVGDOMImplementation.SVG_NAMESPACE_URI, "svg", null);
        TransformerFactory tf = TransformerFactory.newDefaultInstance();
        Transformer transformer = tf.newTransformer();
        transformer.transform(new DOMSource(doc), new StreamResult(System.out));
    }
}

output

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" 
     xmlns:xlink="http://www.w3.org/1999/xlink" 
     contentScriptType="text/ecmascript" 
     zoomAndPan="magnify" 
     contentStyleType="text/css" 
     preserveAspectRatio="xMidYMid meet" 
     version="1.0"/>