ng-base/projects/base-core/tsconfig.lib.json

{
  "extends": "../../tsconfig.json",
  "compilerOptions": {
    "outDir": "../../out-tsc/lib",
    "declaration": true,
    "declarationMap": true,
    "inlineSources": true,
    "types": []
  },
  "exclude": [
    "**/*.spec.ts"
  ]
}