Update node-sass 5.0.0

[tanrax]

No description provided.

[rekmarks]

It would be positively astounding if this were merged 🙏

[rekmarks]

It'll probably require a major version bump of gulp-sass due to changes to permitted Node version, but it doesn't look like it'll require any code changes: https://github.com/sass/node-sass/releases/tag/v5.0.0

[tanrax]

Only with this small change it works for me

[sujeetkrjaiswal]

Why should gulp-sass needs a dependency on node-sass, given users can choose between node-sass and sass (dart-sass) as a compiler? An issue also has been opened for this: #782

[C-Lodder]

Just make it a peerDependency so people have to manually install and manage the node-sass version.
Depending on a package that needs to ship new binaries for every Node.js version is a PITA

[rekmarks]

Signal boost: The problem hasn't gone away; I'd still love for this to happen.

[xzyfer]

Thanks all, close this to focus efforts on #802 which is more rounded at this point in time.