rand Dependency

[RamiHg]

Hello,

Kudos on this really interesting crate. It fits my needs quite well! I noticed, however, that this crate depends on rand. I like to keep my dependencies as small as possible, and rand is a particularly heavy crate (112kB!) that has a lot of bells and whistles.

Unless there's a particular need for advanced and cryptographically secure random numbers, would it be possible to drop the dependency on rand? Perhaps a simpler (non-secure) alternative like simplerand could be used. If that's not possible, maybe the random functionality can be hidden behind a feature flag?

Thanks!

[droundy]

Using just my phone I don't see where it's needed. I'd welcome a pull request to remove the dependency or if needed change it to a dev-dependency. Or I'll try to get to this within a week or two.

[droundy]

Sorry that last comment was false. I forgot that I use random numbers when expanding the hash table in order to give some protection against collision attacks. I doubt we need high quality random numbers for this, and it's not needed at all for many use cases. Maybe a no-rand feature flag would be simplest?