A JSR 223 (Scripting API) compatible wrapper around the REPL for improved
interoperability with software that supports it.
It works by instantiating a new script engine through the script engine manager.
The script engine provides a eval method to evaluate scripts in string form.
Example use:
val m = new javax.script.ScriptEngineManager()
val e = m.getEngineByName("scala")
println(e.eval("42"))