[Snyk] Security upgrade rack from 1.6.4 to 2.0.9.1

[ryanmcmorrowsnyk]

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

Snyk changed the following file(s):

• Gemfile
• Gemfile.lock

Breaking Change Assessment! <- Click to expand>.

Breaking Change Assessment: High 🔴

This major version upgrade from Rack 1.6.4 to 2.0.9.1 introduces significant breaking changes as part of the move to the 2.0 series. The changes focus on modernizing the Rack specification, which may require code and middleware updates for compliance.

Actionable Items:

• Streaming Body: Middleware can no longer use `#each` on the response body. If streaming is required, the body must now respond to `#call`.
• Header API: Response header keys must now be all lowercase, and values can be an Array for multiple values, replacing the previous `\n`-separated string format.

Source: Rack Changelog
Recommendation: These changes to the core Rack specification require careful validation of all middleware and application code that directly interacts with response bodies or headers. Proceed with caution and thorough testing.

Privacy Note 🤖: This is an AI summary generated using only our own internal data. No customer data is ever used in this process.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Arbitrary Code Injection SNYK-RUBY-RACK-2848599	255
	Denial of Service (DoS) SNYK-RUBY-RACK-2848600	153

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Arbitrary Code Injection
🦉 Denial of Service (DoS)