Upgrade php-cs-fixer to 3.x and fix CS

tests/Composer/Test/Plugin/PluginInstallerTest.php

@@ -249,7 +249,7 @@ class PluginInstallerTest extends TestCase
     /**
      * @param string            $newPluginApiVersion
      * @param CompletePackage[] $plugins
-     * 
+     *
      * @return void
      */
     private function setPluginApiVersionWithPlugins($newPluginApiVersion, array $plugins = array())
@@ -407,7 +407,7 @@ class PluginInstallerTest extends TestCase
      * @dataProvider invalidImplementationClassNames
      * @param callable $invalidImplementationClassNames
      * @param string $expect
-     * 
+     *
      * @return void
      */
     public function testQueryingWithInvalidCapabilityClassNameThrows($invalidImplementationClassNames, $expect = 'UnexpectedValueException')
@@ -441,7 +441,7 @@ class PluginInstallerTest extends TestCase
                ->will($this->returnCallback(function () {
                    return array();
                }));
-        
+
         /** @phpstan-ignore-next-line */
         $this->assertNull($this->pm->getPluginCapability($plugin, $capabilityApi));
     }
@@ -449,7 +449,7 @@ class PluginInstallerTest extends TestCase
     /**
      * @dataProvider nonExistingOrInvalidImplementationClassTypes
      * @param callable $wrongImplementationClassTypes
-     * 
+     *
      * @return void
      */
     public function testQueryingWithNonExistingOrWrongCapabilityClassTypesThrows($wrongImplementationClassTypes)