fix(router): support rendering development exceptions with html entities (#1854)

Author: innocenzi

packages/router/src/Exceptions/DevelopmentException.php

@@ -46,7 +46,7 @@ public function __construct(Throwable $throwable, Response $response, Request $r
                 'script' => Filesystem\read_file(__DIR__ . '/local/dist/main.js'),
                 'css' => Filesystem\read_file(__DIR__ . '/local/dist/style.css'),
                 'hydration' => map([
-                    'stacktrace' => $stacktrace,
+                    'stacktrace' => json_encode($stacktrace),
                     'context' => $throwable instanceof ProvidesContext ? $throwable->context() : [],
                     'rootPath' => root_path(),
                     'request' => [