Fixed

• #4227 fix style binding removal on reused nodes (@defcc via #4235)
• #4233 only treat form bindings as domProps on specific elements
• #4236 fix watcher firing unnecessarily for NaN values
• #4237 fix kept-alive components not getting updated props when re-activated
• #4239 fix transition-group move class when no name prop is provided (@decademoon)
• #4247 fix v-html resetting content even when content string stays the same
• #4253 fix duplicate ref + v-for when used with async components