A wrapper around [`v8::Script::Compile()`](https://v8docs.nodesource.com/io.js-3.3/da/da5/classv8_1_1_script_compiler.html#a93f5072a0db55d881b969e9fc98e564b).
Note that `Nan::BoundScript` is an alias for `v8::Script`.
Calls `script->Run()` or `script->BindToCurrentContext()->Run(Nan::GetCurrentContext())`.
Note that `Nan::BoundScript` is an alias for `v8::Script` and `Nan::UnboundScript` is an alias for `v8::UnboundScript` where available and `v8::Script` on older versions of V8.