[TASK] Use the new core namespace (#81)

Author: oliverklee

composer.json

@@ -60,18 +60,18 @@
     },
     "scripts": {
         "list-modules": [
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::listModules"
+            "PhpList\\Core\\Composer\\ScriptHandler::listModules"
         ],
         "create-directories": [
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::createBinaries",
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::createPublicWebDirectory"
+            "PhpList\\Core\\Composer\\ScriptHandler::createBinaries",
+            "PhpList\\Core\\Composer\\ScriptHandler::createPublicWebDirectory"
         ],
         "update-configuration": [
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::createGeneralConfiguration",
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::createBundleConfiguration",
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::createRoutesConfiguration",
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::createParametersConfiguration",
-            "PhpList\\PhpList4\\Composer\\ScriptHandler::clearAllCaches"
+            "PhpList\\Core\\Composer\\ScriptHandler::createGeneralConfiguration",
+            "PhpList\\Core\\Composer\\ScriptHandler::createBundleConfiguration",
+            "PhpList\\Core\\Composer\\ScriptHandler::createRoutesConfiguration",
+            "PhpList\\Core\\Composer\\ScriptHandler::createParametersConfiguration",
+            "PhpList\\Core\\Composer\\ScriptHandler::clearAllCaches"
         ],
         "post-install-cmd": [
             "@create-directories",

composer.lock

@@ -9,6 +9,6 @@
 >
     <php>
         <ini name="error_reporting" value="-1"/>
-        <server name="KERNEL_CLASS" value="PhpList\PhpList4\Core\ApplicationKernel"/>
+        <server name="KERNEL_CLASS" value="PhpList\Core\Core\ApplicationKernel"/>
     </php>
 </phpunit>

phpunit.xml.dist

@@ -4,7 +4,7 @@
 namespace PhpList\BaseDistribution\Tests\System\HttpEndpoints;
 
 use GuzzleHttp\Client;
-use PhpList\PhpList4\TestingSupport\Traits\SymfonyServerTrait;
+use PhpList\Core\TestingSupport\Traits\SymfonyServerTrait;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 

tests/System/HttpEndpoints/RestApiTest.php

@@ -4,7 +4,7 @@
 namespace PhpList\BaseDistribution\Tests\System\HttpEndpoints;
 
 use GuzzleHttp\Client;
-use PhpList\PhpList4\TestingSupport\Traits\SymfonyServerTrait;
+use PhpList\Core\TestingSupport\Traits\SymfonyServerTrait;
 use PHPUnit\Framework\TestCase;
 
 /**