4.0.0

Added

None.

Changed

• Upgrades Composer to 2.0 version.
• Upgrades NGINX to 1.19.6 version.
• Upgrades NGINX Brotli Module to 1.0.9 version.
• Upgrades PHP to 8.0 version.
• Upgrades PHPUNIT configuration file to new schema.
• Update LICENSE and README year from 2020 to 2021 🎇
• Completely rewritten sources code and now it became more simplified.
• PHP performs the role of "template engine" to generate NGINX configuration
  and read/forward the Spacetab configuration. Does not control the NGINX process.
• 99% backward compatibility.
• Using asynchronous non-blocking i/o.
• Web-server configuration files separated to easily configuring.
• Improved error handling.

Removed

• Removed box-project/box from project dependencies. Now uses separated docker image to build a phar-archive.
• Removed code which is responsible for dist-code modification. Because is too hard for understanding and this project
  is too small for such an abstraction layer. Now dist-code modification is enabled by default and no option to
  disable it.
• A lot of many composer packages that no need anymore...

Fixed

• A potential fix of bug when web-server spawn zombie processes.