Update node-gyp to the latest version 🚀

[greenkeeper[bot]]

The devDependency node-gyp was updated from 5.0.5 to 6.0.0.

This version 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.

---

Publisher: rvagg License: MIT

Find out more about this release.

---

FAQ and help

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html). If those don’t help, you can always [ask the humans behind Greenkeeper](https://github.com/greenkeeperio/greenkeeper/issues/new).

---

Your Greenkeeper bot :palm_tree:

[greenkeeper[bot]]

• The devDependency node-gyp was updated from 5.0.5 to 6.0.1.

Update to this version instead 🚀

Commits

The new version differs by 15 commits.

• 68319a2 v6.0.1: bump version and update changelog
• 8ec2e68 doc: add macOS_Catalina.md document
• 1b11be6 gyp: python3 fixes: utf8 decode, use of 'None' in eval
• c0282da gyp: iteritems() -> items() in compile_commands_json.py
• d8e09a1 gyp: make cmake python3 compatible
• 9c0f340 gyp: fix TypeError in XcodeVersion()
• bb2eb72 gyp: finish decode stdout on Python 3
• f069341 src,win: allow 403 errors for arm64 node.lib
• c60c22d deps: update deps to roughly match current npm@6
• b91718e test: upgrade Linux Travis CI to Python 3.8
• 3538a31 doc: adjustments to the README.md for new users
• 4fff845 travis: ignore failed brew upgrade npm, update xcode
• 60e4488 build: avoid bare exceptions in xcode_emulation.py
• 032db2a lib,install: always download SHA sums on Windows
• 5a83630 travis: add Windows + Python 3.8 to the mix

See the full diff