[Snyk] Security upgrade selenium-standalone from 6.17.0 to 6.21.0#19

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edmooney wants to merge 1 commit intomasterfrom snyk-fix-28a6d6270dc441819e330e570fd71ab0

+340-363

Commits on Nov 27, 2023

fix: package.json & package-lock.json to reduce vulnerabilities
snyk-bot
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