Check if backmon is susceptible to a repojacking attack

[Arichikurumo]

New research has found that over 15,000 Go module repositories on GitHub are vulnerable to repojacking.

We should check if any modules used in backmon are vulnerable to this type of attack. The following article describes the problem: https://thehackernews.com/2023/12/15000-go-module-repositories-on-github.html