paper-color-picker doesn't render in Safari 9.0.2

[Peppe]

Hi!

Thanks for a cool component. I have used it in one of my applications but I have the problem that it doesn't seem to render on Safari 9 on Mac. Everything else in the app renders except the paper-color-picker. For me at least it can be reproduced already in the official demo, which shows blank in Safari. http://david-mulder.github.io/paper-color-picker/components/paper-color-picker/demo/

Error message in Safari console is "SyntaxError: Unexpected token '>'" an it refers to paper-color-picker.html, function: immediateColorChanged, row 488:
colors.forEach((color) => {

[WayneKeenan]

need this pull request applying to fix: #17