Add Rector as a code analysis

This change better aligns the description shown here with the project's description

Add Laravel Vapor as a serverless tool

One more string manipulation library, with UTF-8 safe replacement methods.

-> https://github.com/voku/portable-utf8#class-methods

* Add basic Github Actions file.

* Rename workflow file.

* Add badge.

* Only on push to master.

Laravel 6 was released and it is a LTS version

* Add Spout in spreadsheet

* REMOVING ```z``` character

Swoole is an event-driven asynchronous & concurrent networking communication framework with high performance written only in C for PHP.

DBUnit is not maintained anymore.
Resolves #1001

In my opinion, it makes sense to remove this recommendation from the list as this package is archived by the owner and is not maintained anymore.