[Snyk] Upgrade core-js from 2.5.3 to 2.6.12#4

snyk-bot wants to merge 1 commit intomastermunrodnz/universal:masterfrom

snyk-upgrade-2a5d409ec56feff60a93e979ffe3b7a3munrodnz/universal:snyk-upgrade-2a5d409ec56feff60a93e979ffe3b7a3Copy head branch name to clipboard