Move twig extension to bundle

composer.json

@@ -22,10 +22,7 @@
         "myclabs/php-enum": "^1.5"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7|^6.0",
-        "twig/twig": "^1.34.2|^2.4.4",
-        "symfony/phpunit-bridge": "^3.0|^4.0",
-        "symfony/routing": "^3.0|^4.0"
+        "phpunit/phpunit": "^5.7|^6.0"
     },
     "autoload": {
         "psr-4": {

phpunit.xml.dist

@@ -1,8 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit bootstrap="vendor/autoload.php" colors="true">
-    <listeners>
-        <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener" />
-    </listeners>
     <testsuites>
         <testsuite>
             <directory suffix="Test.php">tests</directory>

src/WriterRegistry.php

@@ -28,15 +28,24 @@ public function loadDefaultWriters(): void
             return;
         }
 
-        $this->addWriter(new BinaryWriter());
-        $this->addWriter(new DebugWriter());
-        $this->addWriter(new EpsWriter());
-        $this->addWriter(new PngWriter());
-        $this->addWriter(new SvgWriter());
+        $this->addWriters([
+            new BinaryWriter(),
+            new DebugWriter(),
+            new EpsWriter(),
+            new PngWriter(),
+            new SvgWriter()
+        ]);
 
         $this->setDefaultWriter('png');
     }
 
+    public function addWriters(iterable $writers): void
+    {
+        foreach ($writers as $writer) {
+            $this->addWriter($writer);
+        }
+    }
+
     public function addWriter(WriterInterface $writer): void
     {
         $this->writers[$writer->getName()] = $writer;

src/WriterRegistryInterface.php

@@ -13,6 +13,8 @@
 
 interface WriterRegistryInterface
 {
+    public function addWriters(iterable $writers): void;
+
     public function addWriter(WriterInterface $writer): void;
 
     public function getWriter(string $name): WriterInterface;