Add composer.libraries.json

Problem/Motivation

Missing composer.libraries.json:

A "composer.libraries.json" file contains information about all up-to-date libraries required by the module itself, and so we will be using this file to install all libraries by merging the "composer.libraries.json" with the "composer.json" file of our Drupal website.

Steps to reproduce

No libraries are download automatically using merge plugin

Proposed resolution

Add composer.libraries.json .