Support for filters (in, like, bound etc.)

[koendirckx]

I assumed that there was full support for the Druid filter types, but it looks like a couple of essential ones might be missing. In particular, the ones I would like to be able to rely on are:

• in
• like
• bound
• interval

Is this already possible or is it possibly on the roadmap? Thanks!

[estliberitas]

@koendirckx well, I don't have time for this yet, but you can send a PR and I will happily merge it.