bug #1855 [LiveComponent] Fix EscaperRuntime deprecation (smnandre)

This PR was merged into the 2.x branch.

Discussion
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[LiveComponent] Fix EscaperRuntime deprecation

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Issues        | Fix #
| License       | MIT

Fix deprecation

Commits
-------

75516f0 [LiveComponent] Fix EscaperRuntime deprecation

Author: kbond

src/LiveComponent/src/Util/LiveAttributesCollection.php

@@ -13,6 +13,7 @@
 
 use Twig\Environment;
 use Twig\Extension\EscaperExtension;
+use Twig\Runtime\EscaperRuntime;
 
 /**
  * An array of attributes that can eventually be returned as an escaped array.
@@ -114,6 +115,10 @@ public function setQueryUrlMapping(array $queryUrlMapping): void
 
     private function escapeAttribute(string $value): string
     {
+        if (class_exists(EscaperRuntime::class)) {
+            return $this->twig->getRuntime(EscaperRuntime::class)->escape($value, 'html_attr');
+        }
+
         if (method_exists(EscaperExtension::class, 'escape')) {
             return EscaperExtension::escape($this->twig, $value, 'html_attr');
         }