Vue: add support for using Nuxt.js in dependencies section

[ikasumiwt]

Issue: none
Related Pull-Requests: #1794

What I did

In my case, getstorybook command is failed when nuxt.js saved to "dependencies" in package.json.

So, I added "dependencies" checking in delect.js.

How to test

Is this testable with jest or storyshots?
No

Does this need a new example in the kitchen sink apps?
No

Does this need an update to the documentation?
No

If your answer is yes to any of these, please make sure to include it in your PR.

[codecov]

Codecov Report

Merging #2056 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2056   +/-   ##
=======================================
  Coverage   21.34%   21.34%           
=======================================
  Files         262      262           
  Lines        5767     5767           
  Branches      693      699    +6     
=======================================
  Hits         1231     1231           
+ Misses       4017     4003   -14     
- Partials      519      533   +14

Impacted Files	Coverage Δ
lib/cli/lib/detect.js	0% <ø> (ø)	⬆️
addons/info/src/components/markdown/code.js	24.13% <0%> (ø)	⬆️
lib/ui/src/modules/ui/libs/filters.js	47.36% <0%> (ø)	⬆️
app/react-native/src/preview/story_kind.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/routes.js	0% <0%> (ø)	⬆️
...res__/update-addon-info/update-addon-info.input.js	0% <0%> (ø)	⬆️
...ponents/left_panel/stories_tree/tree_decorators.js	33.33% <0%> (ø)	⬆️
...react-native/src/manager/components/PreviewHelp.js	0% <0%> (ø)	⬆️
addons/knobs/src/KnobManager.js	32% <0%> (ø)	⬆️
addons/knobs/src/components/types/Number.js	8.06% <0%> (ø)	⬆️
... and 16 more

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