[Snyk] Security upgrade sinatra from 1.3.5 to 2.0.0#7

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sbarbeau-od wants to merge 1 commit intomasterfrom snyk-fix-8596d9decbc636d8f0d00220e6960fd5

+16-9

Commits on Mar 9, 2023

fix: demo/Gemfile & demo/Gemfile.lock to reduce vulnerabilities
snyk-bot
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