animationIterationCount has wrong type for 2 or more animations

[jdecked]

Do you want to request a feature or report a bug?
A bug.

If the current behavior is a bug, please provide the steps to reproduce and
if a minimal demo of the problem via Glitch or similar (template:
https://glitch.com/edit/#!/react-native-web-playground).

Glitch demo code: https://glitch.com/edit/#!/zesty-carpenter?path=src/App/index.js:46:2
Live Glitch demo: https://zesty-carpenter.glitch.me/

Reproduction steps:

1. Create a component which uses StyleSheet for styling and apply styles.animation:

var styles = StyleSheet.create({
  animation: {
    animationDuration: '1s, 2s',
    animationIterationCount: '1, infinite',
    animationName: [
      {
        from: { top: '2em' },
        to: { top: 0 }
      },
      {
        '15%': {
          transform: [{ scale: 2 }],
          backgroundColor: 'red'
        },
        '30%': {
          transform: [{ scale: 1 }]
        }
      }
    ]
  }
})

2. Run the project locally and open the Developer Tools console.
3. Realize there's an error: Warning: Failed prop type: Invalid prop animationIterationCountsupplied toView.

What is the expected behavior?
animationIterationCount should accept string values for multiple animations, much in the same way animationDuration does. There should be no Failed prop type error.

OS: macOS Sierra 10.13.6
Browser: Chrome 67.0.3396.99
React Native for Web (version): 0.8.8
React (version): 16.3.1