libs/common/tsconfig.lib.json

{
  "extends": "../../tsconfig.json",
  "compilerOptions": {
    "declaration": false,   //true generates .d.ts files which are used for type definitions
    "outDir": "../../dist/libs/common",
    "sourceMap": false
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "dist", "test", "**/*spec.ts"]
}