What range of ruby versions are supported?

[Fitzsimmons]

I'm wondering which range of ruby versions are intended to be supported since SecureRandom.uuid() has been present in the standard library since 2.0. I can submit a pull request that replaces the custom implementation with the one in the standard library unless 1.8 support is still needed.

It's also feasible to detect at runtime if SecureRandom is available and fall back to the custom implementation if it's not.