在使用 Travis Ci 构建 Hexo 时出现了构件失败的情况,报错信息为 : error Your lockfile needs to be updated, but yarn was run with `--frozen-lockfile`. info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command. The command "eval yarn --frozen-lockfile " failed. Retrying, 2 of 3.