[Snyk] Fix for 4 vulnerable dependency paths

[snyk-bot]

This pull request fixes one or more vulnerable packages in the npm dependencies of this project. See the Snyk test report for this project for details.

The PR includes:

• package.json scripts and a Snyk policy (.snyk) file, which patch the vulnerabilities that can't be upgraded away and ignore vulnerabilities with no fixes.

Vulnerabilities that will be fixed

With a Snyk patch:

• npm:debug:20170905
• npm:minimatch:20160620
• npm:ms:20170412

You can read more about Snyk's upgrade and patch logic in Snyk's documentation.

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

Stay secure, The Snyk team

[coveralls]

Coverage remained the same at 27.941% when pulling 478d831fb529f4a9f1ef25e7a81b8c5b8a2fe9eb on snyk-fix-3652e2c0 into 0593d00f395bb6f4126f2a34dc5bcfa3223ccf45 on master.