[Snyk] Upgrade protoo-server from 4.0.4 to 4.0.6#4

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snyk-bot wants to merge 1 commit intomasterfrom snyk-upgrade-3e7ee69ae1fcf5f3e60a191342721684

+50-13

Commits on Jul 4, 2021

fix: upgrade protoo-server from 4.0.4 to 4.0.6
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