message: [Dev] Adds a lock for the node/yarn/npm versions which match metaphysics
diff: "name": "emission",
  "version": "1.4.0-beta.4",
  "description": "Artsy React(Native) components.",
  + "engines": {
  + "node": "8.4.x",
  + "npm": "5.4.x",
  + "yarn": "1.x"
  + },
  "main": "index.ios.js",
  "scripts": {
  "bundle": "haul bundle --platform=ios --dev=false --entry-file=index.ios.js --bundle-output Pod/Assets/Emission.js --sourcemap-output Pod/Assets/Emission.js.map --assets-dest Pod/Assets && rm -rf Pod/Assets/assets/node_modules",
  