Fix files configuration entry in package.json for @wordpress/babel-preset-default

[nerrad]

Description

The package doesn’t have build and build-module directories so the published entrypoint should be index.js.

When I went to install the package in a plugin it was installed with no index.js entrypoint in the node_modules/wordpress/babel-preset-default folder. Thus all builds of my plugin failed with:

Module build failed (from ./node_modules/babel-loader/lib/index.js):
    Error: Cannot find module '@wordpress/babel-preset-default' from '/Users/dethier/webprojects/vagrant/www/ee-alpha-testing/wp-content/plugins/event-espresso-core'

For testing this will likely require just doing the various npm script runs.

The published package is currently broken because of this so another release will need done.

[aduth]

Looks good 👍

[aduth]

Looking through other packages for potential issues...

• browserslist-config offers an index.js
  • Has no files and points main to index.js (would be inferred anyways), so should be fine
• jest-preset-default offers an index.js
  • files does not include index.js
  • But: It is in the published package. I'm guessing npm includes main file as well automatically?
    • Verify at: https://unpkg.com/@wordpress/jest-preset-default@2.0.0/
    • Which means an alternate fix for this pull request may be to just add the main directive. But as-is should work just as well (with index.js being included in files and inferred as main)
• npm-package-json-lint-config offers an index.js
  • Has no files and points main to index.js (would be inferred anyways), so should be fine
• scripts has no build, offers scripts and utils folders
  • Included in its files, so should be fine

[gziolo]

The package doesn’t have build and build-module directories so the published entrypoint should be index.js.

My bad, sorry about that. I'm merging and will publish another version soon 👍

[gziolo]

@aduth according to https://docs.npmjs.com/files/package.json#files:

Certain files are always included, regardless of settings:

package.json
README
CHANGES / CHANGELOG / HISTORY
LICENSE / LICENCE
NOTICE
The file in the "main" field