Add support for lottie_light.js

[jhadenfeldt]

Lottie itself is pretty large, it would be great to be able to just import lottie_light.js for those cases where only the svg renderer and no expressions are needed.

[samg0rd]

Hi, i'm facing the same problem that my vendor.js file gets too big because vue-lottie's weight is like 528kb , all im doing with vue-lottie is to show an after effect json animation. do you have any suggestions for me?

thanks in advance