Add parcel-bundler and fontawesome to the list of dependencies.

[elenm]

This allows yarn start to work without requiring manual install of these dependencies. Also moves the fontawesome import from the HTML file to the JS file, such that it is not necessary to copy fontawesome to a local directory to run the app.

[jedgar1mx]

Fontawesome is not added as a dependency since the drupal appliaction already has a specific version installed. We don't want to add it to the build bundle.