v11.9.0

• Added node.lookupPrefix(), node.lookupNamespaceURI() and node.isDefaultNamespace().
• Fixed the cloning of Documents; previously it would not clone all of the appropriate state, and would sometimes add an extra document type node.
• Fixed various edge cases in the textContent and nodeValue properties.
• Fixed canvas.toBlob() to properly pass through the JPEG quality argument, instead of always passing zero to node-canvas. (@challakoushik)