Change prev/next arrows and change stars

To make the stars center:

.testimonial_rotator_stars { text-align: center; }
.testimonial_rotator_star { float: none; }

There is no easy way to make the arrows SVG. I’m using a font for them so they will expand and look great at any size. More about that can be found here: https://halgatewood.com/docs/plugins/testimonial-rotator/changing-stars