message: update to released embroider 0.6.0
diff: "@cardstack/jsonapi": "0.14.21",
  "@ember/jquery": "^0.6.1",
  "@ember/optional-features": "^0.7.0",
  - "@embroider/compat": "^0.3.5",
  - "@embroider/core": "^0.3.5",
  - "@embroider/webpack": "^0.3.5",
  + "@embroider/compat": "^0.6.0",
  + "@embroider/core": "^0.6.0",
  + "@embroider/webpack": "^0.6.0",
  "@glimmer/component": "^0.14.0-alpha.3",
  "babel-eslint": "^8.0.2",
  "broccoli-asset-rev": "^3.0.0",
  