https://proxy.golang.org/github.com/vantum/vantum/@v/v0.0.0-20180815184342-fe37d5f7a990.zip: https://proxy.golang.org/github.com/vantum/vantum/@v/v0.0.0-20180815184342-fe37d5f7a990.zip: 429 Too Many Requests