Update voku/portable-utf8 dependency to dev-master and fix JSON formatting

Author: Claudio-Emmolo

composer.json

@@ -19,7 +19,7 @@
         "php": "^8.1|^8.2|^8.3|^8.4",
         "spatie/laravel-package-tools": "^1.16",
         "illuminate/contracts": "^10.0|^11.0|^12.0",
-        "voku/portable-utf8": "^6.0",
+        "voku/portable-utf8": "dev-master",
         "voku/simple_html_dom": "^4.8"
     },
     "require-dev": {
@@ -33,7 +33,7 @@
         "phpstan/extension-installer": "^1.3",
         "phpstan/phpstan-deprecation-rules": "^1.1",
         "phpstan/phpstan-phpunit": "^1.3"
-        },
+    },
     "autoload": {
         "psr-4": {
             "The3LabsTeam\\AdsPostParser\\": "src",
@@ -71,4 +71,4 @@
     },
     "minimum-stability": "dev",
     "prefer-stable": true
-}
+}