message: packages/catalog-model: ouput both cjs and esm
diff: {
  "name": "@backstage/catalog-model",
  "version": "0.1.1-alpha.6",
  - "main": "dist/index.esm.js",
  + "main": "dist/index.cjs.js",
  + "module": "dist/index.esm.js",
  "main:src": "src/index.ts",
  "types": "src/index.ts",
  "license": "Apache-2.0",
  "access": "public"
  },
  "scripts": {
  - "build": "backstage-cli plugin:build",
  + "build": "backstage-cli build",
  "lint": "backstage-cli lint",
  "test": "backstage-cli test",
  "prepack": "backstage-cli prepack",
  