angular.json

{
    "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
    "version": 1,
    "newProjectRoot": ".",
    "projects": {
      "angularfire": {
        "projectType": "library",
        "root": "src",
        "sourceRoot": "src",
        "prefix": "angularfire",
        "architect": {
          "build": {
            "builder": "@angular-devkit/build-ng-packagr:build",
            "options": {
              "tsConfig": "tsconfig.json",
              "project": "src/package.json"
            }
          },
          "test": {
            "builder": "@angular-devkit/build-angular:karma",
            "options": {
              "main": "src/test.ts",
              "tsConfig": "tsconfig.spec.json",
              "karmaConfig": "karma.conf.js"
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": [
                "tsconfig.json",
                "tsconfig.spec.json"
              ],
              "exclude": [
                "**/node_modules/**"
              ]
            }
          }
        }
      }},
    "defaultProject": "angularfire"
  }