@Root Decorator is missing in exports

[babbarankit]

Fix @Root issue regarding exporting it as a decorator

• Add it to exports
• Create functional tests

[felipesabino]

@babbarankit I complemented the issue to include the functional tests to this decorator. I guess if there were tests for this, the missing export issue wold have been more visible.

[babbarankit]

Thanks @felipesabino for the merge. I am not so familiar with writing tests, but will try to do it.