Handle paste event if input event not supported

Author: domchristie

src/expanding.js

@@ -13,7 +13,10 @@ function Expanding (textarea) {
   wrap(textarea, this.element)
   this.element.appendChild(this.textareaClone.element)
 
+  var inputHandler = this.update.bind(this)
   this.textarea.on(inputEvent, this.update.bind(this))
+  if (inputEvent !== 'input') this.textarea.on('paste', inputHandler)
+
   this.update()
 }