Fix styling

Author: rubenvanassche

src/Transformers/EnumTransformer.php

@@ -73,7 +73,7 @@ protected function toEnumValue(ReflectionEnumBackedCase $case): string
     {
         $value = $case->getBackingValue();
 
-        if (!is_string($value)) {
+        if (! is_string($value)) {
             return "{$value}";
         }
 

tests/Transformers/EnumTransformerTest.php

@@ -11,7 +11,6 @@
 use ReflectionClass;
 use Spatie\TypeScriptTransformer\Tests\FakeClasses\IntBackedEnum;
 use Spatie\TypeScriptTransformer\Tests\FakeClasses\StringBackedEnum;
-use Spatie\TypeScriptTransformer\Tests\FakeClasses\StringBackedEnumWithSingleQuotes;
 use Spatie\TypeScriptTransformer\Transformers\EnumTransformer;
 use Spatie\TypeScriptTransformer\TypeScriptTransformerConfig;
 use UnitEnum;