Update node-sass to version 3.8.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

node-sass just published its new version 3.8.0.

State	Update 🚀
Dependency	node-sass
New version	3.8.0
Type	devDependency

This version is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of node-sass.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

Do you have any ideas how I could improve these pull requests? Did I report anything you think isn’t right?
Are you unsure about how things are supposed to work?

There is a collection of frequently asked questions and while I’m just a bot, there is a group of people who are happy to teach me new things. Let them know.

Good luck with your project ✨

You rock!

🌴

---

GitHub Release

Features

• Add an audible cue when there's a CLI error behind a --error-bell CLI flag (@Peterhactch, #1578)
• Replace cross-spawn-async with cross-spawn (@danez, #1563)
• Let watcher know when files are added or removed (@xzyfer, #1538)
• Add missing jsdoc for public API functions (@nschonni, #1528)
• Add a changelog (@xzyfer, #1523)
• Add Node.js 6 support to readme (@coderbyheart, #1506)

Fixes

• Fix code coverage reporting (@nschonni, #1583)
• Fix the options object passed to render and renderSync being mutated (@xzyfer, #1168)

---

The new version differs by 12 commits (ahead by 12, behind by 1).

• a6594d1 Update changelog
• f3443a5 v3.8.0
• 655a85f Prevent options from leaking (#1595)
• ea6e470 Merge pull request #1583 from nschonni/fix-travis-coverage-var
• 491c3a4 Chore: Add missing 'error.js' to coverage list
• e790fe5 Chore: Fix Coveralls conditional for Travis-CI
• f912216 In watch mode, play an audible cue when there is an error. (#1578)
• f2f481b Replace cross-spawn-async with cross-spawn (#1563)
• ad4c44c Update watched file list when files are added or removed (#1539)
• a04e84d Docs: Add jsdocs for human readable public methods (#1528)
• dfd8341 Add a changelog (#1523)
• 653ab03 Add Node.js 6 to supported versions. (#1506)

See the full diff.

---

This pull request was created by greenkeeper.io.

_{Tired of seeing this sponsor message? ⚡ greenkeeper upgrade}