[Snyk] Security upgrade ngx-socket-io from 2.1.1 to 3.3.0#47

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-ecd6ee74dc0f307e410d64da45008366

+311-217

Commits on May 5, 2021

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