update for php8.4

Author: juliangut

composer.json

@@ -29,7 +29,8 @@
     "ext-mbstring": "*",
     "php-di/php-di": "^7.0.1",
     "psr/container": "^1.0|^2.0",
-    "slim/slim": "^4.8"
+    "slim/slim": "^4.8",
+    "symfony/polyfill-php84": "^1.30"
   },
   "require-dev": {
     "bnf/phpstan-psr-container": "^1.0",

src/ContainerTrait.php

@@ -45,7 +45,7 @@ public function get(string $name): mixed
             );
         } catch (Throwable $exception) {
             throw new DependencyException(
-                rtrim($exception->getMessage(), '.') . '.',
+                mb_rtrim($exception->getMessage(), '.') . '.',
                 (int) $exception->getCode(),
                 $exception,
             );