Method queue

test/tools/cmap_spec_runner.ts:133–141

(op: CmapOperation, thread?: Thread)

  }

  queue(op: CmapOperation, thread?: Thread) {
    if (this.#killed || this.#error) {
      return;
    }

    const functionToQueue = () => (!thread ? this._runOperation(op) : thread.queue(op));

    this.#promise = this.#promise.then(functionToQueue).catch(e => (this.#error = e));
  }

  async finish() {
    this.#killed = true;