[Snyk] Fix for 20 vulnerabilities

[Season-Z]

Snyk has created this PR to fix 20 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• website/package.json
• website/yarn.lock

Note for zero-installs users

If you are using the Yarn feature zero-installs that was introduced in Yarn V2, note that this PR does not update the .yarn/cache/ directory meaning this code cannot be pulled and immediately developed on as one would expect for a zero-install project - you will need to run yarn to update the contents of the ./yarn/cache directory.
If you are not using zero-install you can ignore this as your flow should likely be unchanged.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Denial of Service (DoS) SNYK-JS-HTTPPROXYMIDDLEWARE-8229906	756
	Excessive Platform Resource Consumption within a Loop SNYK-JS-BRACES-6838727	696
	Denial of Service (DoS) SNYK-JS-WS-7266574	696
	Improper Handling of Extra Parameters SNYK-JS-FOLLOWREDIRECTS-6141137	686
	Regular Expression Denial of Service (ReDoS) SNYK-JS-BABELRUNTIME-10044504	666
	Regular Expression Denial of Service (ReDoS) SNYK-JS-PATHTOREGEXP-7925106	666
	Information Exposure SNYK-JS-FOLLOWREDIRECTS-6444610	646
	Cross-site Scripting (XSS) SNYK-JS-SERIALIZEJAVASCRIPT-6147607	626
	Inefficient Regular Expression Complexity SNYK-JS-MICROMATCH-6838728	589
	Information Exposure SNYK-JS-FOLLOWREDIRECTS-2332181	586
	Regular Expression Denial of Service (ReDoS) SNYK-JS-WS-1296835	586
	Improper Verification of Cryptographic Signature SNYK-JS-NODEFORGE-2430339	579
	Open Redirect SNYK-JS-EXPRESS-6474509	519
	Improper Handling of Unexpected Data Type SNYK-JS-ONHEADERS-10773729	516
	Regular Expression Denial of Service (ReDoS) npm:debug:20170905	506
	Improper Verification of Cryptographic Signature SNYK-JS-NODEFORGE-2430337	494
	Improper Verification of Cryptographic Signature SNYK-JS-NODEFORGE-2430341	494
	Cross-site Scripting SNYK-JS-EXPRESS-7926867	469
	Arbitrary Code Injection SNYK-JS-PRISMJS-9055448	436
	Information Exposure SNYK-JS-FOLLOWREDIRECTS-2396346	344

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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🦉 Regular Expression Denial of Service (ReDoS)
🦉 Open Redirect
🦉 Cross-site Scripting
🦉 More lessons are available in Snyk Learn