[Snyk] Fix for 2 vulnerabilities

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change
	Denial of Service (DoS) SNYK-JS-NODESASS-540982	Yes
	Out-of-bounds Read SNYK-JS-NODESASS-540986	Yes

Commit messages

Package name: node-sass

The new version differs by 191 commits.

• dfe1f05 Update changelog
• 8319be2 4.11.0
• 7929c32 Merge pull request #2543 from sass/libsass-subtreee
• ea9ffd6 Update sass-spec devDependency to use commit hash
• a6aab24 Remove call to removed sass_option_push_import_extension
• f06781d Merge commit '912301673420cdd8fbc1efcd09037206539915ee' as 'src/libsass'
• 9123016 Squashed 'src/libsass/' content from commit 39e30874
• 688d654 Remove committed src/libsass
• 9b7015c Update changelog
• c65a1bf 4.10.0
• c73e2fc feat: Add detecton for Node 11 (module 67)
• 0c31dc2 build: Use GCC 4.9 for Travis Node 10 and 11
• f74e9cd Update .travis.yml
• 97849b2 Add Node 11 to TravisCI
• 4aa3982 Add Node 11 to AppVeyor
• 746759c Upgrade request package to v.2.88
• cdf24f2 4.9.3
• ff64b09 fix: bump node-gyp for hoek fix
• 33e8b36 Typo: verion -> version
• 60d9ae9 chore: Remove Travis Gitter hook (#2453)
• ecfcab0 4.9.2
• 57c8b59 Stop telling people to run npm rebuild with --force
• cba089d Remove custom issue template
• 240e8da 4.9.1

See the full diff

Check the changes in this PR to ensure they won't cause issues with your project.

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