[Snyk] Fix for 20 vulnerabilities

[eablack]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `yarn` 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
  • yarn.lock

• 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 an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Regular Expression Denial of Service (ReDoS) SNYK-JS-ANSIREGEX-1583908	Yes	Proof of Concept
	Regular Expression Denial of Service (ReDoS) SNYK-JS-BROWSERSLIST-1090194	Yes	Proof of Concept
	Arbitrary Code Injection SNYK-JS-EJS-1049328	Yes	Proof of Concept
	Remote Code Execution (RCE) SNYK-JS-EJS-2803307	Yes	Proof of Concept
	Information Exposure SNYK-JS-EVENTSOURCE-2823375	Yes	Proof of Concept
	Regular Expression Denial of Service (ReDoS) SNYK-JS-GLOBPARENT-1016905	Yes	Proof of Concept
	Prototype Pollution SNYK-JS-IMMER-1019369	Yes	Proof of Concept
	Prototype Pollution SNYK-JS-IMMER-1540542	Yes	Proof of Concept
	Prototype Pollution SNYK-JS-JSON5-3182856	Yes	Proof of Concept
	Regular Expression Denial of Service (ReDoS) SNYK-JS-LOADERUTILS-3042992	Yes	No Known Exploit
	Prototype Pollution SNYK-JS-LOADERUTILS-3043105	Yes	No Known Exploit
	Regular Expression Denial of Service (ReDoS) SNYK-JS-LOADERUTILS-3105943	Yes	No Known Exploit
	Regular Expression Denial of Service (ReDoS) SNYK-JS-MINIMATCH-3050818	Yes	No Known Exploit
	Regular Expression Denial of Service (ReDoS) SNYK-JS-POSTCSS-1255640	Yes	Proof of Concept
	Command Injection SNYK-JS-REACTDEVUTILS-1083268	Yes	Proof of Concept
	Cross-site Scripting (XSS) SNYK-JS-SERIALIZEJAVASCRIPT-536840	Yes	No Known Exploit
	Arbitrary Code Injection SNYK-JS-SERIALIZEJAVASCRIPT-570062	Yes	Proof of Concept
	Remote Code Execution (RCE) SNYK-JS-SHELLQUOTE-1766506	Yes	No Known Exploit
	Regular Expression Denial of Service (ReDoS) SNYK-JS-SSRI-1246392	Yes	Proof of Concept

With a Snyk patch:

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

Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

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

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Regular Expression Denial of Service (ReDoS)
🦉 Regular Expression Denial of Service (ReDoS)
🦉 Arbitrary Code Injection
🦉 More lessons are available in Snyk Learn