Implement PHP CS Fixer and a coding standard to follow (#471)

* Create PHP CS Fixer config and add to CI workflow

* Run php cs fixer on project

* Add newline at end of file

* Update to use PHP CS Fixer v3

* Run v3 config on project

* Run seperate config in CI

app/Rules/RelationNotExist.php

@@ -2,12 +2,12 @@
 
 namespace Crater\Rules;
 
-
 use Illuminate\Contracts\Validation\Rule;
 
 class RelationNotExist implements Rule
 {
     public $class;
+
     public $relation;
 
     /**