Transparent Background for LottieAnimationView

[smartelligence]

Is your feature request related to a problem? Please describe.
I use the LottieAnimationView inside canvases together with other shapes. My test-lottie's are rendered with white background which overlaps shapes. I would be beneficial if there would be an option inside LottieSharp to render the shapes with transparent background. I know there are SharpDX options for that, but I don't know nothing about SharpDX in detail.

Describe the solution you'd like
Background is not white but transparent.

Describe alternatives you've considered
I tried to set "background" to "000" for the LottieAnimationView, but that had no effect. There are notes about "how to set sharpdx background to transparent" by setting the background and the backgroundcolor to "#00000000" but this didn't seemed to work.

Additional context
I'm willing to contribute if someone would give me an pointer where to add it.