[Snyk] Security upgrade npm from 2.15.12 to 6.13.4

[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:
  • test/fixtures/pkg-mean-io/package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	726/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 8.1	Arbitrary File Overwrite SNYK-JS-NPM-537603	Yes	Proof of Concept

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

Commit messages

Package name: npm

The new version differs by 250 commits.

• fd29398 6.13.4
• f2aca36 docs: changelog for 6.13.4
• 320ac9a Do not remove global bin/man links inappropriately
• d06f5c0 bin-links@1.1.6
• 52fd210 gentle-fs@2.3.0
• 45482c2 6.13.3
• 118bc96 docs: changelog for 6.13.3
• 1743cb3 read-package-json@2.1.1
• fb4ecd7 pacote@9.5.11
• 59c836a npm-packlist@1.4.7
• 19ce061 bin-links@1.1.5
• 0a0fdff 6.13.2
• dc0178c update AUTHORS
• c6ff3ba docs: update changelog for 6.13.2
• 4429645 makefile: fix docs target typo
• 4c1b16f chore: Warn the user that it is uninstalling npm-install
• ae7afe5 fix: Don't log error message if git tagging is disabled
• 1c65d26 fix(fund): open url for string shorthand
• e4b9796 shrinkwrap: no need to read package.json when read shrinkwrap
• 8676429 fix(packageRelativePath): fix 'where' for file deps
• d480f2c Revert "windows: Add preliminary WSL support for npm and npx"
• b829d62 6.13.1
• 464036b update AUTHORS
• 1d61a3c docs: update changelog for 6.13.1

See the full diff

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