Minimal fix to get IE/Edge working.

There are various better sources for this fix than this repo.  See
discussion on facebook/react#7027 and various
react-autosuggest forks.

We might want to detect IE11/Edge rather than doing this across the
board but this is a start (what about IE < 11?).

src/Autosuggest.js

@@ -254,7 +254,7 @@ class Autosuggest extends Component {
  }
  }
  },
- onChange: event => {
+ onInput: event => {
  const { value } = event.target;
  const { shouldRenderSuggestions } = this.props;