[Snyk] Fix for 1 vulnerabilities

[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

• Adding or updating a Snyk policy (.snyk) file; this file is required in order to apply Snyk vulnerability patches.
  Find out more.

Vulnerabilities that will be fixed

With a Snyk patch:

Severity	Issue	Exploit Maturity
	Prototype Pollution SNYK-JS-LODASH-567746	Proof of Concept

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

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[coveralls]

Coverage remained the same at 98.367% when pulling a52665c on snyk-fix-6e0b4e25b2df4a2c9783eaaba1ce3b46 into 010281a on master.

[mikelax]

This PR looks to already be superseded by a recent commit. I was wondering if that will result in a new version 8.0.3 being published to npm?