feature #1835 [TwigComponent] Fix EscaperExtension deprecation (smnandre)

This PR was merged into the 2.x branch.

Discussion
----------

[TwigComponent] Fix EscaperExtension deprecation

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Issues        | Fix
| License       | MIT

Commits
-------

93107f9 [TwigComponent] Fix EscaperExtension deprecation

Author: kbond

src/TwigComponent/src/Twig/TwigEnvironmentConfigurator.php

@@ -15,6 +15,7 @@
 use Symfony\UX\TwigComponent\ComponentAttributes;
 use Twig\Environment;
 use Twig\Extension\EscaperExtension;
+use Twig\Runtime\EscaperRuntime;
 
 /**
  * @final
@@ -31,7 +32,9 @@ public function configure(Environment $environment): void
         $this->decorated->configure($environment);
         $environment->setLexer(new ComponentLexer($environment));
 
-        if ($environment->hasExtension(EscaperExtension::class)) {
+        if (class_exists(EscaperRuntime::class)) {
+            $environment->getRuntime(EscaperRuntime::class)->addSafeClass(ComponentAttributes::class, ['html']);
+        } elseif ($environment->hasExtension(EscaperExtension::class)) {
             $environment->getExtension(EscaperExtension::class)->addSafeClass(ComponentAttributes::class, ['html']);
         }
     }