Update bufferutil to the latest version 🚀

[greenkeeper]

Version 4.0.0 of bufferutil was just published.

Dependency	bufferutil
Current Version	3.0.5
Type	dependency

The version 4.0.0 is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

It might be worth looking into these changes and trying to get this project onto the latest version of bufferutil.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.

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Commits

The new version differs by 6 commits.

• ede3ed0 [dist] 4.0.0
• 7a688e9 [minor] Remove license comments
• a024343 [minor] Use prebuildify (#105)
• 70e0161 [ci] Remove unsupported node versions
• e860735 [major] Port to N-API
• 799ce2b chore(package): update mocha to version 5.2.0 (#103)

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[greenkeeper]

• The dependency bufferutil was updated from 3.0.5 to 4.0.1.

Update to this version instead 🚀

Commits

The new version differs by 8 commits.

• e367139 [dist] 4.0.1
• 7cc7367 [minor] Set NAPI_VERSION to 1
• ff6e157 chore(package): update prebuildify to version 2.10.0 (#112)
• 283561c fix(package): update node-gyp-build to version 3.7.0 (#111)
• 9ae2b52 fix(package): update node-gyp-build to version 3.6.0 (#110)
• 8eff02e chore(package): update prebuildify to version 2.9.1 (#109)
• 7d5c4dd fix(package): update node-gyp-build to version 3.5.0 (#108)
• 1a83453 chore(package): update prebuildify to version 2.8.0 (#107)

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