Update npm-asset/dropzone library from ~4.0 to ~5.0

Problem/Motivation

Dropzonejs 8.x-2.4 module was released 15 Jan 2021 at 18:01 EET
https://www.drupal.org/project/dropzonejs/releases/8.x-2.4

They had #3180903: Update the version of DropzoneJs library to 5.7.2
version: 4.0.1 to version: 5.7.2

Proposed resolution

Change to "npm-asset/dropzone": "~5.0",

Remaining tasks

User interface changes

None

API changes

None

Data model changes

None