requestAnimationFrame polyfill library

requestAnimationFrame polyfill library for nodejs and old browsers.
```
$ yarn add request-animation-frame-polyfill
`typescript
import { requestAnimationFrame, cancelAnimationFrame } from 'request-animation-frame-polyfill'
let id: number
const hello = (time: number) => {
console.log('hello:' + time)
id = requestAnimationFrame(hello)
}
id = requestAnimationFrame(hello)
setTimeout( () => cancelAnimationFrame(id), 100)
`
Build:
`shell`
$ yarn build
``
$ cd example
$ npx ts-node main.ts
`shell``
$ npm login
$ npm publish