[Snyk] Security upgrade npm from 5.5.0 to 5.8.0

[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	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	469/1000 Why? Has a fix available, CVSS 5.1	Denial of Service (DoS) npm:mem:20180117	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: npm

The new version differs by 178 commits.

• ee147fb 5.8.0
• 7d5a7ea docs: tiny changelog fixes
• df27cdd 5.8.0-next.0
• 9b206bb update AUTHORS
• a571f80 doc: update changelog for npm@5.8.0
• 58d2aa5 pack: use a specific mtime when packing (#20027)
• 8150dd5 makefile: dont call destructive 'uninstall' on clean (#16540)
• b2a1cf0 docs: document `browser` field (#18382)
• 9847c82 error-message: more detailed message for inaccessible files. (#18384)
• 7a87051 docs: Clarify that "files" is an exclusive list of files (#18407)
• f0e998d config: Do replace environment in config files even for keys (#18426)
• b57780b pack: Don't rely on entry point to be npm-cli.js (#18450)
• d7ff071 docs: capitalize javascript cause why not (#18514)
• d70c019 unsupported: Remove ES6 code from unsupported error logging (#18953)
• 35c4abd docs: typo fix in coding style (#18976)
• 1d368e1 install: Support for --no-proxy configuration (#19157)
• dcdfdcb docs: add --development info in npm-ls.md (#19192)
• c2bbaaa docs: tiny style fix in npm.md (#19194)
• 0616fd2 docs: add "edit" section to description in npm-team.md (#19216)
• de72d9a docs: sync package-lock spec and help page (#19307)
• b9d0c0c xmas: Holidays are for all JS, not just Node (#19448)
• ffa84cd docs: added example for homepage pkgjson field(#19475)
• dc36d85 docs: update now saves by default (#19552)
• c8230c9 npx: fix npx prefix issue (#19608)

See the full diff

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

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