Allow styleLoaders to depends to env

[bertho-zero]

"env": {
    "development": {
      "styleLoaders": ["style-loader", "css-loader", "resolve-url-loader", "sass-loader"],
      "extractStyles": false
    },
    "production": {
      "styleLoaders": ["style-loader", "css-loader", "sass-loader"],
      "extractStyles": true
    }
  }

---

This change is 

[justin808]

@bertho-zero:

1. Why this param only?
2. What's the use case?
3. Can you provide a test for this?

If we're going to do this, we'd need a readme note on this, as well as a changelog entry.

[bertho-zero]

There is already the extractStyles parameter, and it is the only ones, with styleLoaders, that can change between development and production.

My use case, this avoids having to create 2 files:

"env": {
    "development": {
      "styleLoaders": ["style-loader", "css-loader", "resolve-url-loader", "sass-loader"],
      "extractStyles": false
    },
    "production": {
      "styleLoaders": ["style-loader", "css-loader", "sass-loader"],
      "extractStyles": true
    }
  }

I do not think there's any need for additional testing.

I updated version, changelog and readme.

[justin808]

This looks good with one tiny thing.

@Judahmeek, do you concur?

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Reviewed 2 of 4 files at r2, 1 of 1 files at r4.
Review status: 3 of 4 files reviewed at latest revision, 1 unresolved discussion.

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CHANGELOG.md, line 8 at r4 (raw file):

## [2.0.0.beta.17] - 2016-12-04
##### Added
- Allow `styleLoaders` to depend on the environment variable 'NODE_PATH' [#222](https://github.com/shakacode/bootstrap-loader/pull/222) by [bertho-zero](https://github.com/bertho-zero).

@bertho-zero You missed the change at the bottom of the file.

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Comments from Reviewable

[justin808]

Reviewed 1 of 4 files at r2.
Review status: all files reviewed at latest revision, 1 unresolved discussion.

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Comments from Reviewable

[bertho-zero]

It is done

[Judahmeek]

Looks good to me.

[justin808]

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Reviewed 1 of 1 files at r5.
Review status: all files reviewed at latest revision, 1 unresolved discussion.

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Comments from Reviewable

[justin808]

Review status: all files reviewed at latest revision, 2 unresolved discussions.

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README.md, line 224 at r5 (raw file):

  - sass-loader

# You can apply loader params here:

@bertho-zero Can you do me a favor and create 3 different fenced code blocks with a short description of each technique.

It's not appropriate to put this all in one code block as if you'd do this all in the same file.

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Comments from Reviewable

[justin808]

@bertho-zero Please update one thing in the README.md

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Review status: all files reviewed at latest revision, 2 unresolved discussions.

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Comments from Reviewable

[bertho-zero]

I separated the example of other, yes it was confused.

On the other hand I do not see what examples I could add..

Not speaking very good English, I do not know what to add to the readme.