[Snyk] Upgrade graphql from 14.6.0 to 15.5.2#1815

snyk-bot wants to merge 1 commit intomasterparse-community/parse-dashboard:masterfrom

snyk-upgrade-9446bd04efbcd8df3b88d8d2336e219fparse-community/parse-dashboard:snyk-upgrade-9446bd04efbcd8df3b88d8d2336e219fCopy head branch name to clipboard