title: echarts Y axis label having vertical text
body: <p>All I'm trying to make charts using e charts library read the documentation and find lots of example over internet too but unable to find how to write label in y-axis with vertical text.</p>
  
  <p>As per the docs where it might be write is axisLabel : {} object but still not sure.</p>
  
  <p>Just want a simple text in vertical at y-axis</p>