[Snyk] Security upgrade gulp-sass from 2.3.2 to 3.0.0#15

snyk-bot wants to merge 1 commit intomasterE-LLP/developer.github.com:masterfrom

snyk-fix-15133e63105124e3de7ae544850a2216E-LLP/developer.github.com:snyk-fix-15133e63105124e3de7ae544850a2216Copy head branch name to clipboard