.info.yml files don't have the drupal version

Problem/Motivation

The modules .info.yml files don't have information about the drupal version (core)

But this is a basic property as you can read in Let Drupal 8 know about your module with an .info.yml file

name: Hello World Module
description: Creates a page showing "Hello World".
package: Custom

type: module
core: 8.x

Proposed resolution

Add the core property and delete the information added automatically by drupal.org.

Remaining tasks

None.

User interface changes

None.

API changes

None.

Data model changes

None.