在 macOS 终端执行并报错如下，新手在网上找了一天没有解决。希望知道的指点下。
ca@james WebDriverAgent-master- % ./scripts/bootstrap.sh
Fetching dependencies
usage: carthage [-h] [--config file]
[--command-verbose | --no-command-verbose]
[--tasks-verbose | --no-tasks-verbose] [--plugin plugin]
{new,generate_requirements,install_dependencies} ...
carthage: error: argument cmd: invalid choice: 'bootstrap' (choose from 'new', 'generate_requirements', 'install_dependencies')