[Snyk] Fix for 1 vulnerabilities

[frwickst]

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 `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/react-scripts/package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	586/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-JS-BROWSERSLIST-1090194	Yes	Proof of Concept

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

Commit messages

Package name: css-loader

The new version differs by 27 commits.

• 43179a8 chore(release): 1.0.0
• 3d53968 Merge remote-tracking branch 'origin/master'
• 240db53 version 1.0 (#742)
• 1b7acf7 Merge remote-tracking branch 'origin/master'
• 1703721 docs(README): add more context to `localIdentName` (#711)
• 1c51265 docs(README): fix malformed emoji (#701)
• 50f8ec0 Merge remote-tracking branch 'origin/master'
• 07444ad tests: css custom variables (#709)
• 3de8aa7 tests: css custom variables (#709)
• df497db chore(release): 0.28.11
• c788450 fix(lib/processCss): don't check `mode` for `url` handling (`options.modules`) (#698)
• c35d8bd chore(release): 0.28.10
• 9f876d2 fix(getLocalIdent): add `rootContext` support (`webpack >= v4.0.0`) (#681)
• 0452f26 test: hashes inside `@ font-face` url (#678)
• 630579d chore(release): 0.28.9
• 604bd4b chore(package): update dependencies
• d1d8221 fix: ignore invalid URLs (`url()`) (#663)
• 0fc46c7 chore(release): 0.28.8
• 333a2ce chore(package): update `dependencies`
• 39773aa ci(travis): use `npm`
• 8897d44 fix: proper URL escaping and wrapping (`url()`) (#627)
• 0dccfa9 fix(loader): correctly check if source map is `undefined` (#641)
• d999f4a docs: Update importLoaders documentation (#646)
• 05c36db test: removed redundant `modules` argument (#599)

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