Lowered package size removing unnecessary production files

[fadrian06]

Before / After

Listado de rutas de carpetas para el volumen Windows 7
El número de serie del volumen es 864F-092D
C:.
|   composer.json
|   composer.lock
|   
\---vendor
    |   autoload.php
    |   
    +---composer
    |       ...
    |       
    \---flightphp
        \---core
-            |   .editorconfig
-            |   .gitignore
             |   composer.json
-            |   flight.sublime-project
             |   index.php
             |   LICENSE
-            |   phpcs.xml
-            |   phpstan.neon
-            |   phpunit.xml
             |   README.md
             |   
             +---flight
             |   |   autoload.php
             |   |   Engine.php
             |   |   Flight.php
             |   |   
             |   +---core
             |   |       Dispatcher.php
             |   |       Loader.php
             |   |       
             |   +---database
             |   |       PdoWrapper.php
             |   |       
             |   +---net
             |   |       Request.php
             |   |       Response.php
             |   |       Route.php
             |   |       Router.php
             |   |       
             |   +---template
             |   |       View.php
             |   |       
             |   \---util
             |           Collection.php
             |           ReturnTypeWillChange.php
             |           
-            \---tests
-                |   ...

[fadrian06]

Before / After

[fadrian06]

It only affects composer install