[Snyk] Upgrade ember-source from 3.8.3 to 3.28.8#23

snyk-bot wants to merge 1 commit intomasterhixio-mh/ember-cli-fastboot:masterfrom

snyk-upgrade-5ade28900e3e7782aa45c48592f13b25hixio-mh/ember-cli-fastboot:snyk-upgrade-5ade28900e3e7782aa45c48592f13b25Copy head branch name to clipboard