chore(deps): update npm to 6.8.x

[mesosphere-web]

This PR contains the following updates:

Package	Type	Update	Change	References
npm	engines	minor	6.7.x -> 6.8.x	homepage, source

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Release Notes

npm/cli

v6.8.0

Compare Source

This release includes an implementation of RFC #​10, documenting an optional field that can be used to specify
the directory path for a package within a monorepo.

NEW FEATURES

• 3663cdef2
  #​140
  Update package.json docs to include repository.directory details.
  (@​greysteil)

BUGFIXES

• 550bf703a
  Add @​types to ignore list to fix git clean -fd.
  (@​zkat)
• cdb059293
  #​144
  Fix common.npm callback arguments.
  (@​larsgw)
• 25573e9b9
  npm.community#​4770
  Show installed but unmet peer deps.
  (@​larsgw)
• ce2c4bd1a
  #​149
  Use figgy-config to make sure extra opts are there.
  (@​zkat)
• 3c22d1a35
  npm.community#​5101
  Fix ls-collaborators access error for non-scoped case.
  (@​zkat)
• d5137091d
  npm.community#​754
  Fix issue with sub-folder local references.
  (@​iarna)
  (@​jhecking)

DEPENDENCY BUMPS

• d72141080
npm-registry-couchapp@2.7.1
  (@​zkat)
• 671cad1b1
npm-registry-fetch@3.9.0:
  Make sure publishing with legacy username:password _auth works again.
  (@​zkat)
• 95ca1aef4
pacote@9.4.1
  (@​aeschright)
• 322fef403
normalize-package-data@2.5.0
  (@​aeschright)
• 32d34c0da
npm-packlist@1.3.0
  (@​aeschright)
• 338571cf0
read-package-tree@5.2.2
  (@​zkat)

MISC

• 89b23a5f7
  #​120
  Use const in lib/fetch-package-metadata.md.
  (@​watilde)
• 4970d553c
  #​126
  Replace ronn with marked-man in .npmignore.
  (@​watilde)
• d9b6090dc
  #​138
  Reduce work to test if executable ends with a 'g'.
  (@​elidoran)
  (@​larsgw)

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[mesosphere-frontend-ci]

🎉 This PR is included in version 4.0.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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