[Snyk] Security upgrade lodash from 4.17.4 to 4.17.21

[tf-security]

Snyk has created this PR to fix 9 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• packages/slate/package.json

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.

⚠️ Warning

Failed to update the yarn.lock, please update manually before merging.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Prototype Pollution SNYK-JS-LODASH-608086	740
	Prototype Pollution SNYK-JS-LODASH-567746	635
	Prototype Pollution SNYK-JS-LODASH-6139239	600
	Prototype Pollution SNYK-JS-LODASH-450202	590
	Prototype Pollution SNYK-JS-LODASH-73638	590
	Code Injection SNYK-JS-LODASH-1040724	585
	Prototype Pollution npm:lodash:20180130	540
	Regular Expression Denial of Service (ReDoS) SNYK-JS-LODASH-1018905	490
	Regular Expression Denial of Service (ReDoS) SNYK-JS-LODASH-73639	445

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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.

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Learn how to fix vulnerabilities with free interactive lessons:

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

[tf-security]

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

✅ security/snyk check is complete. No issues have been found. (View Details)

✅ license/snyk check is complete. No issues have been found. (View Details)

✅ code/snyk check is complete. No issues have been found. (View Details)

[gitstream-cm]

This PR is missing a Jira ticket reference in the title or description.
Please add a Jira ticket reference to the title or description of this PR.

[gitstream-cm]

🥷 Code experts: no user matched threshold 10

See details

packages/slate/package.json

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