title: Change the thickness/width of a d3 chart's axis lines without affecting tick labels
body: <p>I'm working on a Power Bi d3 chart and I'm trying to change the thickness/width of the chart's axis lines. This following code changes the width of the line but also affects the tick's labels, drastically altering the font.</p>
  
  <pre><code>this.xAxis
     .style({ 'stroke': 'black', 'fill': 'none', 'stroke-width': '1px'}) 
     .call(xAxis);
  </code></pre>
  
  <p>I want to NOT impact the tick's labels. How can I only change the axis lines?</p>