message: install babel-plugin-macros and preval
diff: "@zeit/next-sass": "0.2.0",
  "babel-core": "7.0.0-bridge.0",
  "babel-plugin-add-react-displayname": "0.0.5",
  + "babel-plugin-macros": "2.4.0",
  + "babel-plugin-preval": "3.0.1",
  "enzyme": "3.5.1",
  "enzyme-adapter-react-16": "1.5.0",
  "eslint": "4.19.1",
  