With the latest react version I'm unable to make this library work, for some reason react-tree-walker is not able to keep the context of the provider.

I was able to reproduce the error inside the asyncBootstrapper.test.js:

`
import React, { Component } from 'react'
import asyncBootstrapper from '../'

const ThemeContext = React.createContext('light')

describe('asyncBootstrapper()', () => {
let values = []
let actualContext
let contextValue

class DeprecatedAPI extends Component {
asyncBootstrap() {
values.push(this.props.id)
return true
}

render() {
  return <div>{this.props.children}</div>
}

}

class NewAPI extends Component {
bootstrap() {
values.push(this.props.id)
actualContext = this.context
return true
}

render() {
  return <div>{this.props.children}</div>
}

}

const app = Foo => (
<ThemeContext.Provider value='dark'>

beforeEach(() => {
values = []
})

it('deprecated API', () =>
asyncBootstrapper(app(DeprecatedAPI)).then(() =>
expect(values).toEqual([1, 2, 4, 3]),
))

it('new API', () =>
asyncBootstrapper(app(NewAPI), null, { bespokeContext: true }).then(() => {
expect(values).toEqual([1, 2, 4, 3])
expect(actualContext).toEqual({
bespokeContext: true,
reactAsyncBootstrapperRunning: true,
})
expect(contextValue).toEqual('dark')
}))
})
`

Updating the react version to 16.6.3 you should be able to reproduce the error.