[Snyk] Security upgrade rack from 1.6.4 to 2.2.19

[ryanmcmorrowsnyk]

Snyk has created this PR to fix 3 vulnerabilities in the rubygems dependencies of this project.

Snyk changed the following file(s):

• Gemfile
• Gemfile.lock

---

This major version upgrade introduces significant breaking changes to the Rack SPEC, which defines the interface between web servers and Ruby applications.

Highlights:

• Header Changes: Response header keys must now be lowercase. Header values with multiple lines must be passed as an Array instead of a newline-separated string. [3]
• Ruby Version: Support for Ruby 2.2 (which reached end-of-life in 2018) has been removed. [3]
• Streaming Body: The interface for streaming response bodies has changed, which may affect middleware. [3]

Source: Rack Changelog
Recommendation: These are fundamental changes that can break applications and middleware. Thorough testing is required to ensure compatibility with your web framework (Rails, Sinatra, etc.) and other Rack-based gems.

Notice 🤖: This content was generated using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

---

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Allocation of Resources Without Limits or Throttling SNYK-RUBY-RACK-13378928	167
	Allocation of Resources Without Limits or Throttling SNYK-RUBY-RACK-13378930	167
	Allocation of Resources Without Limits or Throttling SNYK-RUBY-RACK-13378932	167

---

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.

---

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

For more information:
🧐 View latest project report
📜 Customise PR templates
🛠 Adjust project settings
📚 Read about Snyk's upgrade logic

---

Learn how to fix vulnerabilities with free interactive lessons:

🦉 Allocation of Resources Without Limits or Throttling