ConditionalExpressions must return a consistent type

[MichaelBuhler]

JS:

val ? 123 : 'abc'

Transpiles to:

_test(scope->*"val") ? make_shared<Number>(123) : make_shared<String>("abc");

producing a C++ compilation error about how the Number and the String are not consistent types.

The transpiler needs to check the types to convert them either/both to shared_ptr<Value> if neccessary.