[Snyk] Fix for 14 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:

• Changes to package.json to upgrade the vulnerable dependencies to a fixed version.

Vulnerabilities that will be fixed

With an upgrade:

• npm:hoek:20180212 - potentially breaking change
• npm:validator:20180218 - potentially breaking change
• npm:lodash:20180130 - potentially breaking change
• npm:fresh:20170908
• 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

[stuartf]

Closing duplicate of #56