Bump node-sass from 4.8.3 to 4.9.0

[dependabot-preview]

Bumps node-sass from 4.8.3 to 4.9.0.

Release notes

Sourced from node-sass's releases.

v4.9.0

Deprecations

[**import**](https://github.com/import)ing of .css files will produce a deprecation warning. This behaviour will be removed in node-sass@5.0.0.

This behaviour violates the Sass language specification. Additionally it makes it impossible to output to the input directory via the CLI or watcher.

Community

• Document why we're forced to use an old version of request (nschonni, #2291)
• Document work around for install node-sass in China (gucong3000, #2206)

Features

• Node 10 support (xzyfer, #2343)
• Bump LibSass@3.5.3 (xzyfer, #2342)
• Bump LibSass@3.5.4 (xzyfer, #2348)

Fixes

• Fix propagate async context (ofrobots, #2298)
• Fix quiet option not quietening everything it should (xzyfer, #2344)

Misc

• Bump gcc@4.9 in Travis CI for Node 10 builds (xzyfer, #2349)
• Add Node 10 builds to CI (xzyfer, #2349)

Supported Environments

OS	Architecture	Node
Windows	x86 & x64	0.10, 0.12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
OSX	x64	0.10, 0.12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Linux*	x86 & x64	0.10, 0.12, 1, 2, 3, 4, 5, 6, 7, 8**, 9**, 10**^
Alpine Linux	x64	4, 6, 7, 8, 9, 10
FreeBSD 10+	amd64	4, 6, 8, 9
FreeBSD 10+	i386	4, 6, 8, 9

*Linux support refers to Ubuntu, Debian, and CentOS 5+
** Node 8 and 9 are not supported on CentOS 5
^ Only available on x64

Commits

• 9d6faf6 Bump LibSass@3.5.4
• 739d768 Bump gcc@4.9 for Node 10
• a124e9d Add Node 10 to CI
• cc7301e Re-implement raw CSS imports for the deprecation warning
• 7ec14df Bump LibSass@3.5.3
• eb5ad0a Revert "Bump LibSass@3.5.3 (#2342)"
• 5e10a9b 4.9.0
• 4a858f1 Respect quiet option in Node API
• 8004d10 Bump LibSass@3.5.3 (#2342)
• 3ab7a16 Fix Node 10 check
• Additional commits viewable in compare view

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