Allow Varbase YouTube Import module to work with Composer ~2.0

Problem/Motivation

NOW that Drupal.org supports composer 2.0
As listed in Drupal Association Supporting Partner Update | September 2020

#3126566: Allow Drupal to work with Composer 2
#3128631: Update dependencies composer/composer ^2 and composer/semver to ^3

Allow varbase-project template to work with Composer ~2.0 #93
https://github.com/Vardot/varbase-project/issues/93

Proposed resolution

Change the following:

    "composer/installers": "~1.0",
    "oomphinc/composer-installers-extender": "~1.0",
    "cweagans/composer-patches": "~1.0",
    "drupal/drupal-library-installer-plugin": "^0.3",

To:

    "composer/installers": "~1.0 || ~2.0",
    "oomphinc/composer-installers-extender": "~1.0 || ~2.0",
    "cweagans/composer-patches": "~1.0",

Remove drupal/drupal-library-installer-plugin

Remaining tasks

• ✅ File an issue about this project
• ✅ Change to support Composer ~2.0
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ✅ Developer Documentation support on feature change/addition
  

  Updating to work with Composer 2.0

  Added

  Varbase YouTube Import

• ➖ User Guide Documentation support on feature change/addition
• ✅ Code review from 1 Varbase team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Release varbase-9.0.3, varbase_youtube_import-8.x-1.0

User interface changes

• N/A

API changes

Can use both Composer ~1.0 and Composer ~2.0

Data model changes

• N/A