fix: support dimensional prop value without px

[fyangstudio]

Update driver-universal.
This PR make driver-universal consistent with driver-dom processing style in web app.

1. support dimensional prop value without px.
   <div style={{width: 100}} /> to <div style="width: 100rpx" />
   see: fix: support dimensional prop value without px #1456

2. 'rpx' translate to 'vw' in web app.(driver-dom)
   <div style={{width: '75rpx'}} /> to <div style="width: 10vw" /> when viewportWidth is 750

Compare

driver	append unit to relevant styles	'rpx' translate	Compatible with flex	Compatible with event
driver-dom	Append 'px'	Translate to 'vw'	Do nothing	Do nothing
driver-weex	Append 'px' that relative to the width of the screen.	Translate to 'px' that relative to the width of the screen.	Do nothing	Do nothing
driver-universal	Append 'rpx'	Do nothing	Support parsing array like display: ["-webkit-box", "-webkit-flex", "flex"]	Support input doubleclick

[fyangstudio]

Driver-dom 此处判断有误：
driver-dom/src/index.js#L100

function isRpx(str) {
  return typeof str === 'string' && str.slice(0, -3) === 'rpx';
} 

此方法应为 slice(-3)，同时不能识别 margin '10rpx 10rpx'，未收敛至 style-unit 目前需进一步修改

---

fixed

[wssgcg1213]