Bump ember-data from 4.12.8 to 5.5.0#911

dependabot[bot] wants to merge 1 commit intomasterembermap/ember-cli-fastboot-testing:masterfrom

dependabot/npm_and_yarn/ember-data-5.5.0embermap/ember-cli-fastboot-testing:dependabot/npm_and_yarn/ember-data-5.5.0Copy head branch name to clipboard