Missing Js.Null.to_opt breaks backwards compatibility in 2.2

[stroiman]

After upgrading to bucklescript 2.2, I get compile errors where I use Js.Null.to_opt.

From the docs, I can see that from_opt still exists (for backwards compatibility?), https://bucklescript.github.io/bucklescript/api/Js.Null.html

[tcoopman]

This is already fixed by #2516 and there should be a minor release out (see #2515)

[stroiman]

Ah damn, I was too quick to report.