Fix lint

The code changes adjust the spacing in the type hint of multiple test methods for better consistency and readability.

Author: juanariastn

Diff for: tests/DefaultImageOptimizerTest.php

@@ -16,7 +16,7 @@ class DefaultImageOptimizerTest extends TestCase
     /**
      * @dataProvider inputAndOutputImageProvider
      */
-    public function testOptimizeImageWithValidData($pathToImage, $pathToOutput, $expectedPathToOutput): void
+    public function testOptimizeImageWithValidData($pathToImage, $pathToOutput, $expectedPathToOutput) : void
     {
         $optimizerChainMock = Mockery::mock(OptimizerChain::class);
         $optimizerChainMock->shouldReceive('optimize')

Diff for: tests/MissingLibraryExceptionTest.php

@@ -9,7 +9,7 @@
 
 class MissingLibraryExceptionTest extends TestCase
 {
-    public function testGeneratesMessage(): void
+    public function testGeneratesMessage() : void
     {
         $library = 'cwebp';
 

Diff for: tests/WebpOptimizerTest.php

@@ -15,7 +15,7 @@ class WebpOptimizerTest extends TestCase
     /**
      * @dataProvider inputAndOutputImageProvider
      */
-    public function testOptimizeImageWithValidData($pathToImage, $pathToOutput, $expectedPathToOutput): void
+    public function testOptimizeImageWithValidData($pathToImage, $pathToOutput, $expectedPathToOutput) : void
     {
         $options = [
             'converters' => [
@@ -57,7 +57,7 @@ public function inputAndOutputImageProvider() : array
         ];
     }
 
-    public function testVerifiesLibraryInstallation(): void
+    public function testVerifiesLibraryInstallation() : void
     {
         $this->expectException(MissingLibraryException::class);