Fix/npm dependencies

[dpanta94]

All Submissions:

• [x] Does your code follow the Extendables standards?
• [ ] Have you written new tests for your changes, as applicable?
• [x] Have you successfully run tests with your changes locally?

Changes proposed in this Pull Request:

Updating/Changing NPM dependencies and lock file. Updating the build process integrating wp-scripts project wide. Adding/modifing npm script commands.

Now npm run build will simply run the whole build process, while npm run package will produce a deployable zip.

A lot of scripts/stylesheets had their relevant position changed in order for the build process to work accross the project following the same logic.

Closes woo#12 .

How to test the changes in this Pull Request:

1. All the scripts and stylesheets should contain to load normally.
2. npm i should install all the dependencies without errors as long as nvm use has been executed prior to that

Other information:

• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changelog entry

No need for a changelog entry