Animate height and circle coordinates.

Note that these tests required a Polyfill bug fix to run correctly:
https://github.com/web-animations/web-animations-js/pull/602
Merge pull request #3 from ewilligers/svg-height

Animate height and circle coordinates.
Animate SVG colors

These tests required a Polyfill fix to interpolate SVG colors
https://github.com/web-animations/web-animations-js/pull/604