Hi! Playing with Rhai on no_std over here (on an actual platform that doesn't provide std).

Currently, 1.18.0 won't build on a platform that doesn't provide std, because it appears to be relying on the once_cell crate having the alloc feature set (to get once_cell::race::OnceBox), but isn't setting that feature itself -- at least when depended on as

rhai = { version = "1.18.0", default-features = false, features = ["no_std"] }

Adding a redundant dep to once_cell and setting the alloc feature in my build causes it to start working:

# TODO: had to add this because rhai isn't requesting a feature it relies on.
once_cell = { version = "1.19.0", default-features = false, features = ["alloc"] }