Bug fix: Revert or refactor evasive transforms

We have master in an unreleasable state. We can fix it by either reverting https://github.com/endojs/endo/pull/608 (if we are satisfied with evaluator options as API for the evasive transforms) or by factoring the evasive transforms out of src/transforms.js and up to a new transforms.js that package.json already points to (but does not yet exist).

[erights]

I have no objection to rolling forward.

@rekmarks I am curious what those other transforms are and why they’re needed?

[kriskowal]

So, assuming we roll forward instead of rolling back, to be releasable, we need to move some of the exports of src/transforms.js into a transforms.js (not src/*, which does not yet exist). There’s already a reference to that file in package.json. The top-level transforms.js should only export intentionally public API.

There are some internal methods in src/transforms.js that need to stay there because they are only useful internally.