[Snyk] Security upgrade @google-cloud/functions-framework from 1.5.1 to 4.0.0

[benjaminhuo]

Snyk has created this PR to fix 2 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• builders/testdata/nodejs/functions/with_prepare_yarn/package.json
• builders/testdata/nodejs/functions/with_prepare_yarn/yarn.lock

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.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Prototype Poisoning SNYK-JS-QS-3153490	696
	Asymmetric Resource Consumption (Amplification) SNYK-JS-BODYPARSER-7926860	624

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• 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:

🦉 Prototype Poisoning

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