[Snyk] Security upgrade gulp-sass from 4.0.2 to 5.0.0

[mattdanielbrown]

Snyk has created this PR to fix 12 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• package.json
• 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
	Prototype Poisoning SNYK-JS-QS-3153490	696
	Regular Expression Denial of Service (ReDoS) SNYK-JS-SEMVER-3247795	696
	Prototype Pollution SNYK-JS-Y18N-1021887	686
	Code Injection SNYK-JS-LODASH-1040724	681
	Prototype Pollution SNYK-JS-JSONSCHEMA-1920922	644
	Prototype Pollution SNYK-JS-AJV-584908	619
	Prototype Pollution SNYK-JS-YARGSPARSER-560381	601
	Regular Expression Denial of Service (ReDoS) SNYK-JS-HOSTEDGITINFO-1088355	586
	Regular Expression Denial of Service (ReDoS) SNYK-JS-LODASH-1018905	586
	Regular Expression Denial of Service (ReDoS) SNYK-JS-PATHPARSE-1077067	586
	Prototype Pollution SNYK-JS-MINIMIST-2429795	506
	Regular Expression Denial of Service (ReDoS) SNYK-JS-MINIMATCH-3050818	479

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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.
• 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.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Prototype Pollution
🦉 Regular Expression Denial of Service (ReDoS)
🦉 Code Injection