update helmet version to improve security and take on CSP patches

[awentzel]

Pull Request

📖 Description

This will upgrade Helmet which we use on Express Middleware for improved application security and also add a content security policy CSP for integration with key partners.

🎫 Issues

• Upgrade security features
• Upgrade includes CSP patches
• Add CSP

👩‍💻 Reviewer Notes

📑 Test Plan

Tested on Creator staging site and in place at the moment.

✅ Checklist

General

• I have included a change request file using $ yarn change
• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

Component-specific

• I have added a new component
• I have modified an existing component
• I have updated the definition file
• I have updated the configuration file

⏭ Next Steps

[codeclimate]

Code Climate has analyzed commit efa9d45 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 80.4%.

View more on Code Climate.