Composer scripts refactored mainly to work on the Windows
Composer scripts refactored mainly to work on the Windows

There was an error on the win7:

```
> composer test
> ./vendor/bin/phpunit; ./vendor/bin/php-cs-fixer fix -v --diff --dry-run;
The system cannot find the path specified.
Script ./vendor/bin/phpunit; ./vendor/bin/php-cs-fixer fix -v --diff --dry-run; handling the test event returned with error code 1
```

In the composer documentstion [written](https://getcomposer.org/doc/articles/scripts.md#writing-custom-commands) that
> Note: Before executing scripts, Composer's bin-dir is temporarily pushed on top of the PATH environment variable so that binaries of dependencies are easily accessible. In this example no matter if the phpunit binary is actually in vendor/bin/phpunit or bin/phpunit it will be found and executed.

So it is should be safe to use just `phpunit` instead `./vendor/bin/phpunit`.

kylekatarnls/Carbon,lucasmichot/Carbon,serima/Carbon,briannesbitt/Carbon