过滤掉jsx属性中的换行符

[2096903746]

  render (h) {
      return (
        <div style='
                line-height: 16px;
                text-align: left;
              '>
              </div>
    )}

以上jsx如果不过滤换行符，会报错： Unterminated string constant

在老版本jsx插件中, 是会过滤掉属性中的换行符，老版本参考：
[ babel-plugin-transform-vue-jsx
/index.js](https://github.com/vuejs/babel-plugin-transform-vue-jsx/blob/6ad7487579094cc188d470171af8f62335193896/index.js#L207)

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