Remove deprecation warning in node-sass 4.0

[ApacheEx]

There are a lot of such warnings:

DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
in Sass 4.0. Use call(get-function("output-float")) instead.

This PR is going to fix them 💯

[ApacheEx]

To use just a get-function we need to have at least sass 3.5.0. So I've added backward capability which support sass 3.3.x and up.

Or on another side we can upgrade sass deps to 3.5.0+ and remove this legacy support.

[joaogarin]

Currently facing the same issue, would be great to get a fix on it ;)

[walterjenner]

We are experiences the same problem in our project. Is there any change to get the fix in soon?

[ApacheEx]

It seems project is not maintained.

What I do:

1. install patch-package: npm i patch-package
2. add to your package.json:

"scripts": {
  "prepare": "patch-package"
}

3. create a folder patches in root of your project and put https://gist.github.com/ApacheEx/3a0296391c14b5103e3bad461e55b316 as patches/singularitygs+1.8.0.patch.
4. run npm i

or just create a fork and apply this patch/PR.

[hjblokland]

Thnx @ApacheEx works like a charm!