defered script load to allow DOM load faster

[saadjunaidi]

What does this PR do? The PR allows defer load the js to allow DOM to load faster

Are there breaking changes in this PR? NO

Testing

Any background context you want to provide?

Is there parity with the server-side/android/iOS integration components (if applicable)?

Does this require a new integration setting? If so, please explain how the new setting works NO

Links to helpful docs and other external resources