[Snyk] Upgrade source-map from 0.5.7 to 0.7.3#8

snyk-bot wants to merge 1 commit intomasterdannybrown13/node:masterfrom

snyk-upgrade-6e8e5fcdc90e6fcb1167b84a49de07eedannybrown13/node:snyk-upgrade-6e8e5fcdc90e6fcb1167b84a49de07eeCopy head branch name to clipboard