title: How to change the boundary color of boxplot?
body: <p>I'd like to create boxplot like this:<img src="https://i.stack.imgur.com/oNeND.png" alt="enter image description here"></p>
  
  <p>This plot is created by bwplot in lattice package. Instead using this function, I hope to use boxplot to plot similar thing. </p>
  
  <p>I notice in boxplot we could only change the color of the box body, how could I change the boundary color of the box by boxplot function?
  Thanks!</p>