fix IE bugs for ES6 static method,eg Array.from

[bowen31337]

Internet explorer, eg IE11 will throw JS error ,when using ES6 static method Array.from . see detail in https://babeljs.io/docs/usage/polyfill/

[tbillington]

Babel polyfill was determined too heavy for being included by default in this project, See:

• ES2016 feature Array.includes is not transpiled #942
• Is there a option to build a ES5 React App? #914
• Polyfills and browser compatibility (Affecting SEO) #746
• Ship additional required polyfills #269

[nhajidin]

Since babel-polyfill uses core-js, you can probably use core-js directly.

if (!Array.from) {
    require('core-js/fn/array/from');
}

[gaearon]

Thanks for the PR but we won't be including Babel polyfill which is huge.
Closing in favor of #969: we need to document available polyfills.