Add exceptions

[Lifailon]

This is a great project for debugging, thanks!

Is it possible to implement exceptions (and/or, conversely, only specific elements) when displaying a struct?

This could be very useful, as some child arrays or elements from library may be too large and unnecessary for display.

[dylannorthrup]

Another use case would be to avoid printing sensitive data (passwords, tokens, etc).

[cmilesdev]

This is something we could do, add the ability to try and mute values of sensitive fields using an algo

[cmilesdev]

#57