[Snyk] Security upgrade snyk from 1.217.3 to 1.290.1

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `yarn` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • functions/package.json
  • functions/yarn.lock
  • functions/.snyk

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Prototype Pollution SNYK-JS-DOTPROP-543489	No	Proof of Concept

With a Snyk patch:

Severity	Issue	Exploit Maturity
	Man-in-the-Middle (MitM) SNYK-JS-HTTPSPROXYAGENT-469131	Proof of Concept
	Command Injection SNYK-JS-TREEKILL-536781	Proof of Concept
	Prototype Pollution npm:extend:20180424	No Known Exploit

Check the changes in this PR to ensure they won't cause issues with your project.

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