fix(Template): allow rendering boolean values as leafs

[Ryman]

Fixes #60.

[nico-abram]

Is there any reason this hasn't been merged in the past year?

[rjloura]

Thanks for fixing. It would be very helpful to have this merged soon. Any idea on timeline?

[cburgdorf]

@Ryman @erickt Is this still alive?

[ninjabear]

Hi all, I feel bad that I've not looked at this. @Ryman's fix looks fine to me but we will need to add it to a release. I think we're prevented doing that until we also solve #63. I will take a look since this is obviously a nuisance!

[ninjabear]

This looks fine to me, I've packaged it up in #71, but I think we'll have to find someone to actually publish the crate as this seems to be a manual process that requires creds.

Closing in favour of #71