[Snyk] Upgrade bootstrap from 4.4.1 to 4.5.0#5

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snyk-bot wants to merge 1 commit intomasterfrom snyk-upgrade-57e887628189e2eb6ae51b27e2f48166

+4-4

Commits on Jun 3, 2020

fix: upgrade bootstrap from 4.4.1 to 4.5.0
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