Update transition declarations for Vue 3 (#617)

Check this out:
https://v3.vuejs.org/guide/transitions-list.html#list-entering-leaving-transitions

src/style/animation.scss

@@ -10,6 +10,7 @@
 }
 
 .#{$namespace}-zoom-in-down-enter,
+.#{$namespace}-zoom-in-down-enter-from,
 .#{$namespace}-zoom-in-down-leave-to {
   opacity: 0;
   transform: scaleY(0);