Feature Request: Mask secret in the output of `git secrets` command

The command `git secrets` outputs the secrets, so it is difficult to use this in CI because the secrets are leaked as the CI log.

```
$ git secrets --scan -r .
./foo.txt:8:  AWS_ACCESS_KEY_ID: *** # the secret is outputted!
...
```

So how about adding the option to mask secrets in the output?

Thank you.