Hugo 0.74.2: A couple of Bug Fixes

Add .Defines to js.Build options 35011bcb @bep #7489

This is needed to import react as a library, e.g.:

{{ $jsx := resources.Get "index.jsx" }}
{{ $options := dict "defines" (dict "process.env.NODE_ENV" "\"development\"") }}
{{ $js := $jsx | js.Build $options }}