code: function tweenGrowth(slice, outerRadius, delay = 0) {
              d3Selection.select(slice)
                  .transition()
                  .delay(delay)
                  .attrTween('d', function(d) {
                      let i = d3Interpolate.interpolate(d.outerRadius, outerRadius);
  
                      return (t) => {
                          d.outerRadius = i(t);
  
                          return shape(d);
                      };
                  });
          }
docs: Animate slice with tweens depending on the attributes given
  
  @param  {DOMElement} slice   Slice to growth
  @param  {Number} outerRadius Final outer radius value
  @param  {Number} delay       Delay of animation
  @private