Update node-sass to version 3.5.2 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

node-sass just published its new version 3.5.2, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of node-sass – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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GitHub Release

Fixes

• Proxies not always being respected when downloading binaries (@xzyfer)

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The new version differs by 96 commits .

• 7e0c359 v3.5.2
• 40aeee4 Revert removal on npmconf
• d707218 Bump v3.5.1 because npm
• a15f54c Merge pull request #1452 from saper/fix-build
• 4f420a5 Use "double quotes" around the binding file name
• 99ea434 Actually check if the binary exists.
• 1e4bba8 v3.5.0: Filter branch for appveyor
• 8e09b74 Merge pull request #1450 from xzyfer/feat/release/3.5.0
• 6519cdf v3.5.0
• ef7a272 Merge pull request #1449 from xzyfer/feat/binary-error
• 211f312 Log the error when there is a problem with the binary
• ec48be4 Bump LibSass 3.3.5
• 5df330d Bump LibSass 3.3.5
• 9c6933f Merge pull request #1435 from xzyfer/fix/binary-verification
• 0fa5e5e Fix a regression in binary verification

There are 96 commits in total. See the full diff.

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[coveralls]

Coverage remained the same at 100.0% when pulling f6ff047 on greenkeeper-node-sass-3.5.2 into ac988bf on master.