[Snyk] Security upgrade sinatra from 3.2.0 to 4.2.0

[samdark]

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

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Allocation of Resources Without Limits or Throttling SNYK-RUBY-RACK-13535097	721
	Regular Expression Denial of Service (ReDoS) SNYK-RUBY-SINATRA-13535098	631

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Allocation of Resources Without Limits or Throttling 🦉 Regular Expression Denial of Service (ReDoS)