[Snyk] Upgrade source-map from 0.6.1 to 0.7.3#2

snyk-bot wants to merge 1 commit intomasterbigcommerce/handlebars.js:masterfrom

snyk-upgrade-35ed590c12a4f79c7fe649f42b59b59ebigcommerce/handlebars.js:snyk-upgrade-35ed590c12a4f79c7fe649f42b59b59eCopy head branch name to clipboard