Set the THREE SVGRenderer as valid SVG element

If you want to set as valid the SVG used by THREE.js (in case you use the SVGRenderer), here the little snippet with a basic THREE.js scene:

const scene = new THREE.Scene()
const camera = new THREE.PerspectiveCamera(35, w / h, 0.1, 100)
const renderer = new SVGRenderer()
renderer.setSize(300,200)

// this is the line that makes valid the SVG element
renderer.domElement.setAttribute('xmlns', 'http://www.w3.org/2000/svg')

el.appendChild(renderer.domElement)

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