Add wat-wat to demos
Add wat-wat to demos

robcolburn/web-animations-demos,robcolburn/web-animations-demos,samthor/web-animations-demos,samthor/web-animations-demos,samthor/web-animations-demos,robcolburn/web-animations-demos,web-animations/web-animations-demos,web-animations/web-animations-demos,web-animations/web-animations-demos