[Snyk] Security upgrade extract-zip from 1.6.6 to 1.6.8

[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
  • package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	471/1000 Why? Recently disclosed, Has a fix available, CVSS 3.7	Prototype Pollution SNYK-JS-MINIMIST-2429795	No	No Known Exploit

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

Commit messages

Package name: extract-zip

The new version differs by 9 commits.

• 2a8df24 1.6.8
• 30ab06c build(deps): upgrade mkdirp to 0.5.4 for security
• 2b2a84e build: ignore lock files
• 422a39f 1.6.7
• 1cd5ceb Merge pull request #72 from maxogden/upgrade-concat-stream
• 4514f66 Travis: test Node 8 & 10 as well
• 3aeb1b1 Upgrade concat-stream to 1.6.2
• c1aa196 Merge pull request #66 from tcoopman/patch-1
• 0e5693f use mkdirp 0.5.1

See the full diff

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

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