calling css() causes an error/styles wont apply

```
VM18771:97 Uncaught TypeError: process.nextTick is not a function
at requestFlush (eval at _default (get-es6-exports.js:26), :97:17)
at rawAsap (eval at _default (get-es6-exports.js:26), :20:9)
at asap (eval at _default (get-es6-exports.js:26), :28:5)
at injectGeneratedCSSOnce (eval at _default (get-es6-exports.js:26), :820:9)
at injectStyleOnce (eval at _default (get-es6-exports.js:26), :840:5)
at injectAndGetClassName (eval at _default (get-es6-exports.js:26), :944:5)
at css (eval at _default (get-es6-exports.js:26), :1155:24)
at CustomComponent.render (eval at _default (get-es6-exports.js:26), :44:36)
at finishClassComponent (react-dom.development.js:7873)
at updateClassComponent (react-dom.development.js:7850)
```

my code:
```
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { StyleSheet, css } from 'aphrodite';

const styles = StyleSheet.create({
wrapper: {
width: '100px',
height: '100px',
}
})

export default class CustomComponent extends Component {
static propTypes = {
getAttributes: PropTypes.func.isRequired,
};

static defaultProps = {};

render() {
const { getAttributes } = this.props;

console.log(css(styles.wrapper)); /// <--- ERROR's HERE

return (

Start with the stack trace at requestFlush, where process.nextTick is reported as unavailable, and reproduce the failure by calling css(styles.wrapper) in the provided CustomComponent example. Determine why style injection reaches that path in this environment; done means css() no longer throws and the component styles apply.

Written by the indexing model from the issue text.