Currently existing "pseudofunction calls" is a quite limited mechanism, which is not enough in some complex scenarios like mocking complex authorization (e.g. http-signature), math computations and others.
Solution
This PR replaces pseudofunctions with Graal-based JavaScript sandbox
Fixes #19
Problem
Currently existing "pseudofunction calls" is a quite limited mechanism, which is not enough in some complex scenarios like mocking complex authorization (e.g. http-signature), math computations and others.
Solution
This PR replaces pseudofunctions with Graal-based JavaScript sandbox