[Snyk] Upgrade nodemon from 1.18.3 to 1.19.4#4

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snyk-bot wants to merge 1 commit intomasterfrom snyk-upgrade-61b26b431829aea3b60469a8f0d7aafc

+251-299

Commits on Apr 15, 2020

fix: upgrade nodemon from 1.18.3 to 1.19.4
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