Apply Drupal core coding standards to composer.json

I'm not sure what went wrong but this patch does not apply properly. Authors are suddenly added outside of the "authors" property.
Also punctuation is broken.

Hi idebr,

Just a regular git apply. But if you take a look at the patch yourself you can clearly see the problem.

Wouldn't it be better to completely remove the composer.json file? It's being created automatically by Drupal.org and adding it manual adds the risk to be different from info.yml.

@Anybody, interesting, where is that documented?
Not here: https://www.drupal.org/docs/creating-custom-modules/add-a-composerjson-file

@dmsmidt: SORRY! -.- I was wrong, you're right! I'm not sure how I got to that conclusion but I guess because of the compatibility information checked by composer when you require a new project (core compatibility). Sorry for the confusion and my stupid mistake!

Anyway I guess the composer.yml in this projects prevents it from (composer) Drupal 9 compatibility so marking this related: #3150122: composer.json is not Drupal 9 compatible

I guess we can use the same string as in the .info.yml?

^8 || ^9

For that #2 would also need work.

Reroll of #2 attached with interdiff. Please review.

I unable to the install the module with composer on a D9 site. I also have the patch at #9 in my composer.json (using cweagans/composer-patches).

The backtrace is quite lengthy, so please take a look at this Pastebin.

Thank for reporting this issue and providing the patch.
I committed the changes.