Adding defer: true to javascript_include_tag
Adding defer: true to javascript_include_tag

I'm adding defer: true to javascript_include_tag so that lit JS works even when we are using the "defer" prop on the main application.js include tag (which is usually importing jQuery). 

I don't see what harms that change could do, but please, let me know if it may break things.
prograils/lit,prograils/lit,prograils/lit