[Snyk] Security upgrade react-scripts from 3.4.4 to 5.0.0

[snyk-io]

Snyk has created this PR to fix 7 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• sandbox_simple/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Arbitrary Code Injection SNYK-JS-LODASH-15869625	183
	Arbitrary Code Injection SNYK-JS-LODASHTEMPLATE-15869628	183
	Excessive Platform Resource Consumption within a Loop SNYK-JS-BRACES-6838727	159
	Missing Release of Resource after Effective Lifetime SNYK-JS-INFLIGHT-6095116	131
	Prototype Pollution SNYK-JS-UNSETVALUE-2400660	115
	Prototype Pollution SNYK-JS-LODASH-15869619	88
	Inefficient Regular Expression Complexity SNYK-JS-MICROMATCH-6838728	45

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• 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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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Prototype Pollution
🦉 Arbitrary Code Injection
🦉 Inefficient Regular Expression Complexity

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues

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