[Snyk] Security upgrade sinatra from 2.0.1 to 2.2.0#22

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-7ca1811f9833a6ab43661c1a9e75e4c5

+8-8

Commits on May 3, 2022

fix: app/Gemfile & app/Gemfile.lock to reduce vulnerabilities
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