[Snyk] Security upgrade react-scripts from 3.4.0 to 3.4.4

[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:
  • packages/app/package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	686/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 7.3	Prototype Pollution SNYK-JS-OBJECTPATH-1017036	No	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: react-scripts

The new version differs by 13 commits.

• d2f813f Publish
• 7641a3c Prepare 3.4.1 release
• d5b527f Update to Babel 7.9 (#8681)
• 6adb82a Add React.StrictMode to default templates (#8558)
• a452ddc Bump dependencies (#8620)
• 3f699fd Fix proxying API request docs (#8515)
• 4d26208 Use native ESLint behaviour when extending (#8276)
• 8ba0ccb Whitelist main in template.json (#8539)
• 7d3b72c Update template example in docs (#8561)
• 2030ee1 Fix optional chaining and nullish coalescing support (#8526)
• 038e6fa Widen eslint-config-react-app peer dependency versions (#7790)
• 7e6d6cd Closes webpack dev server and exits process on "end" stdin (#7203)
• af926d5 Bump pnp-webpack-plugin (#8509)

See the full diff

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