Improve build process

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The current release build process generates a compiled file that works fine, but if imported via webpack (or mix) causes a warning like this to be thrown on build:

WARNING in ./node_modules/@murmurcreative/drawer/dist/index.js 1:292-296
Critical dependency: the request of a dependency is an expression
 @ ./resources/assets/scripts/modules/primary-nav.js
 @ ./resources/assets/scripts/app.js
 @ multi ./resources/assets/scripts/app.js ./resources/assets/styles/app.css ./resources/assets/styles/editor.css

This error seems to be a result of how Parcel compiles things down to a single file, using it's own require functionality, which webpack then complains about.

So far as I can tell this has no negative effects (beyond throwing this error) but the intent for this package is for it to be simple, easy, and understandable, and arcane errors are counter to those goals.

Potential solutions:

1. Don't use parcel to build
2. Don't worry about compiling into a single file

Since I'd like to generate a single artifact people can import and then go, I'm leaning toward option 1, much as I like Parcel.