[Snyk] Security upgrade sequelize from 5.21.9 to 6.6.5#177

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-0f19936b75c9f19232df131e77b3d357

+51-70

Commits on Jul 8, 2021

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