Add dependencies to neutrino-dev

[darkwing]

The Jest preset is an awesome step forward. A few more dependencies we should add:

• react-addons-test-utils
• enzyme

These allow more react-specific testing, like enzyme to create shallow JSX components. I also needed react-addons-test-utils just for tests to run.

[eliperelman]

So, since these are dependencies of the project itself, and need to be required from the test, they will need to also be dependencies of the project. Just like React and ReactDOM aren't included in the neutrino-preset-react, these 2 dependencies need to also be required by the project.

Since Jest isn't technically React specific, I think this is going to boil down to better documentation. We should probably add a section to the Jest preset that if you are testing React components, to also include these as devDependencies.

[eliperelman]

Addressed in #37.

[eliperelman]

In docs:

https://neutrino.js.org/presets/neutrino-preset-jest/#installation-react-testing