Set zone.js as a peer and dev dependency

[emilio-martinez]

Issue: #4641

What I did

Set zone.js as a peer and dev dependency for @storybook/angular.

How to test

Behavior shouldn't change since Storybook should be pulling the version of zone.js already being used in Angular projects anyway.

[igor-dv]

@kroeder should we add zone.js in cli?

[kroeder]

You mean when running sb init? No, there's no angular without zone.js installed. ng new my-app already does add zone.js, angular does not work without it - We do not need to take care of this

https://medium.com/@MertzAlertz/what-the-hell-is-zone-js-and-why-is-it-in-my-angular-2-6ff28bcf943e

Let’s do an experiment. Go and take your favorite Angular 2 app, and don’t include zone.js. See what happens, I’ll wait here. Notice anything interesting? None of the bindings are working!

[emilio-martinez]

CLI tests seem to have tripped while testing Vue

Module build failed (from ./node_modules/vue-loader/index.js):
TypeError: Cannot read property 'vue' of undefined

[igor-dv]

Yes. I see this error in master. will check

[codecov]

Codecov Report

Merging #4663 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4663   +/-   ##
=======================================
  Coverage   35.59%   35.59%           
=======================================
  Files         557      557           
  Lines        6732     6732           
  Branches      884      884           
=======================================
  Hits         2396     2396           
  Misses       3876     3876           
  Partials      460      460

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