asset files includes ES6 syntax

[liangzhuang327]

errorInfo: Uncaught SyntaxError: Use of const in strict mode.
tinyColor2 code:
const trimLeft = /^\s+/; const trimRight = /\s+$/;

react-color dependences inludes TinyColor2 ;
version: TinyClolor2——@1.5.2 ； react-color——@2.18.0
device: android version is 5.0 and chrome version is 39
suggestion: output the bundle should translate ES6 to ES5

[bgrins]

I have a work in progress for this in https://github.com/bgrins/TinyColor/tree/build-babel

[bgrins]

Hi @liangzhuang327 this fix should be published on npm. Let me know if you have any more issues with it.