Generator uses grouped-queue but does not depend on it

[flatiron32]

This change broke my generator #1150

  ● Test suite failed to run

    Cannot find module 'grouped-queue/lib/subqueue' from 'index.js'

      at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:276:11)
      at Object.<anonymous> (node_modules/yeoman-generator/lib/index.js:17:18)

My fix is to directly depend on grouped-queue directly.

[mshima]

@flatiron32 can you confirm #1190 fixes this problem?

[flatiron32]

I am not sure I know how to test correctly because. When I checkout branch v4.6.0 (the version I first experience a problem with), run npm link, and in my project run npm link yeoman-generator I don't have the failing tests any more. AFAIKT from diffing the package there is no change.
I think I need advice on how to test a local branch of yeoman-generator in my generator.

[mshima]

I normally test with npm install mshima/generator#master

[mshima]

Eslint was supposed to error with this missing dependency.

This patch will fail if you use custom priorities.
I will not add grouped-queue dependency here, because I will add min environment required for some features.
So I have plans to remove addSubQueue workaround.

[flatiron32]

I confirm that #1190 will make my generator's tests pass.
v4.5.0 --> Pass
v4.6.0 --> Fail
V4.7.0 --> Fail
#1190 --> Pass
All with no changes to my generator.