Maybe a bug, scrubs emails

https://github.com/go-playground/mold/blob/4214131ed726fa5c2ec3f1d943ac4e696ed523fe/scrubbers/string.go#L17

Maybe this?

```go
scrubbed := fmt.Sprintf("<<scrubbed::email::sha1::%s>>", hashString(input[:idx])) 
```

Should hash the string before `@`?