Writing BoolValue

Hello there,

I cannot write a TrueClass or FalseClass bin. I found that BoolValue raises an exception when writing.

```
    def write(buffer, offset)
      raise Exception.new("Unreachable")
    end
    
 ```

May I know why? And what's the walk around in order to write a boolean? The DB is accessed by other services, so I would like to keep data type consistency.

Thanks 