[Snyk] Security upgrade @storybook/react from 5.3.14 to 6.1.20

[Sambego]

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:
  • package.json
  • package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	479/1000 Why? Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-JS-GLOBPARENT-1016905	Yes	No Known Exploit

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

Commit messages

Package name: @storybook/react

The new version differs by 250 commits.

• d09748c v6.1.20
• bb90a86 Update root, peer deps, version.ts/json to 6.1.20
• c6ec784 6.1.20 changelog
• 0ff4c31 Merge pull request #14019 from storybookjs/chore_vue3_snippets_and_assorted_adjustments
• 7b8009d Merge pull request #14015 from phated/phated/update-react-dev-utils
• e15a2e1 6.1.19 latest.json version file
• 45a5540 Update git head to 6.1.19
• 79b72d3 v6.1.19
• 978aed2 Update root, peer deps, version.ts/json to 6.1.19
• c891cab 6.1.19 changelog
• 7b98271 Merge pull request #13991 from storybookjs/fix/13830-add-missing-dep
• d85bd6a Merge pull request #13998 from storybookjs/13709--fix-typo
• daf69ba Merge pull request #13680 from semihraifgurel/next
• 4f83e49 Merge pull request #13968 from oscard0m/patch-1
• 9a7ec62 Merge pull request #13591 from crixx/chore/#13590-update-docs
• e12db32 Merge pull request #13945 from storybookjs/add-audi-docs
• 1faf457 Merge pull request #13746 from ka2jun8/patch-1
• afdac39 Merge pull request #13910 from storybookjs/13039-improve-hoisted-snippet
• 8692248 Merge pull request #13758 from qoalu/patch-4
• 0762248 fix(component): add missing `regenerator-runtime` dependency
• fdf7167 6.1.18 latest.json version file
• d7150cf Update git head to 6.1.18
• 7b49fc1 v6.1.18
• ad47dce Update root, peer deps, version.ts/json to 6.1.18

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