support for jest-enzyme 3

[shai32]

Can you still reproduce it?
yea

What are you reporting?
create-react-app fail when using jest-enzyme version 3 and above
it fails on the line import 'jest-enzyme';

Tell us what you think should happen.
it should work

Tell us what actually happens.
it shows an error

Environment

react-scripts 0.9.5
node 7.7.4
npm 4.1.2

1. Operating system:
   mac os
2. Browser and version:
   chrome 57

it fails because jest-enzym need jest 19

[Timer]

This will be out in 0.10, for now, use an older version of jest-enzyme.
See #1604.