[Snyk] Upgrade core-js from 2.5.7 to 2.6.12#7

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masterMfuon2/tutorials:masterfrom

snyk-upgrade-da28f542d57f72d168db9c1fd3c0e0e1Mfuon2/tutorials:snyk-upgrade-da28f542d57f72d168db9c1fd3c0e0e1Copy head branch name to clipboard