Method withLockAsync

src/utils.ts:313–320

* Execute an async function while holding the lock

(fn: () => Promise<T>)

   * Execute an async function while holding the lock
   */
  async withLockAsync<T>(fn: () => Promise<T>): Promise<T> {
    this.acquire();
    try {
      return await fn();
    } finally {
      this.release();
    }
  }

  /**
   * Check if a process is still running