Function updateStdinGetter

ng-dev/release/precheck/precheck.spec.ts:55–57

* Updates the `process.stdin` property. Direct assignments will not work * since NodeJS declares `stdin` using a property accessor.

(newStdin: NodeJS.ReadableStream)

   * since NodeJS declares `stdin` using a property accessor.
   */
  function updateStdinGetter(newStdin: NodeJS.ReadableStream) {
    Object.defineProperty(process, 'stdin', {get: () => newStdin});
  }

  /** Invokes the build command handler. */
  async function invokePrecheck(stdin: ReleasePrecheckJsonStdin) {