[Snyk] Upgrade gulp-flatten from 0.2.0 to 0.4.0#10

snyk-bot wants to merge 1 commit intoremove-custom-frequencyrobdyke/Open-eObs-Modules:remove-custom-frequencyfrom

snyk-upgrade-534e89e0a9b94dbd696be71aee677428robdyke/Open-eObs-Modules:snyk-upgrade-534e89e0a9b94dbd696be71aee677428Copy head branch name to clipboard