crawlergo 直接退出了

0.12的版本下载后只有5.1M，不知道是精简过多了。执行后就直接退出了
➜  crawlergo mv ~/Downloads/crawlergo ./
➜  crawlergo chmod +x crawlergo
➜  crawlergo ./crawlergo
[1]    9838 killed     ./crawlergo
➜  crawlergo ./crawlergo -h
[1]    9845 killed     ./crawlergo -h
➜  crawlergo ./crawlergo
[1]    9852 killed     ./crawlergo
➜  crawlergo