Updated composer.json to allow Symfony 4 installations

DependencyInjection/Configuration.php

@@ -4,6 +4,7 @@
 
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
+
 /**
  * This is the class that validates and merges configuration from your app/config files
  *
@@ -23,4 +24,4 @@ public function getConfigTreeBuilder()
     // more information on that topic.
     return $treeBuilder;
   }
-}
+}

Handler/ExceptionHandler.php

@@ -122,6 +122,10 @@ static public function getSubscribedEvents()
    * in the html status exception handler load the backtrace and send it in an email.
    *
    * @param GetResponseForExceptionEvent $event
+   *
+   * @throws \Twig_Error_Loader
+   * @throws \Twig_Error_Runtime
+   * @throws \Twig_Error_Syntax
    */
   public function onKernelException(GetResponseForExceptionEvent $event)
   {
@@ -241,6 +245,10 @@ private function buildBacktrace(GetResponseForExceptionEvent $event)
    * @author Wendo
    *
    * @param FilterResponseEvent $responseObject
+   *
+   * @throws \Twig_Error_Loader
+   * @throws \Twig_Error_Runtime
+   * @throws \Twig_Error_Syntax
    */
   public function onKernelResponse(FilterResponseEvent $responseObject)
   {

composer.json

@@ -17,12 +17,19 @@
   ],
   "require": {
     "php": ">=7.0",
-    "symfony/symfony": ">= 3.0.0",
+    "symfony/filesystem": "~3.0|~4.0",
+    "symfony/dependency-injection": "~3.0|~4.0",
+    "symfony/security": "~3.0|~4.0",
+    "symfony/config": "~3.0|~4.0",
+    "symfony/event-dispatcher": "~3.0|~4.0",
+    "symfony/http-foundation": "~3.0|~4.0",
+    "symfony/http-kernel": "~3.0|~4.0",
+    "symfony/twig-bundle": "~3.0|~4.0",
     "symfony/swiftmailer-bundle": ">=2.6.0"
   },
   "autoload": {
     "psr-4": {
       "Kickin\\ExceptionHandlerBundle\\": ""
     }
   }
-}
+}