dropped support for Symfony 3.4 in order to avoid deprecation notices…

… while running tests with Symfony >= 5.4

.travis.yml

@@ -9,26 +9,25 @@ jobs:
   include:
     - stage: smoke test 🕵️
       php: 7.3
-      env: DEPS='lowest' WITH_DOCTRINE_CACHE_BUNDLE='yes' SYMFONY_DEPRECATIONS_HELPER='max[self]=2&max[direct]=168&max[indirect]=871'
+      env: DEPS='lowest' WITH_DOCTRINE_CACHE_BUNDLE='yes' SYMFONY_DEPRECATIONS_HELPER='max[indirect]=1066'
     -
       php: 8.0
       env: DEPS='unmodified' WITH_STATIC_ANALYSIS='yes'
 
     - stage: test
       php: 7.3
-      env: SYMFONY_VERSION='3.4.*' WITH_DOCTRINE_CACHE_BUNDLE='yes' SYMFONY_DEPRECATIONS_HELPER='max[indirect]=4'
+      env: SYMFONY_VERSION='4.4.*' WITH_DOCTRINE_CACHE_BUNDLE='yes' SYMFONY_DEPRECATIONS_HELPER='max[indirect]=4'
     -
       php: 7.4
       dist: focal
-      env: SYMFONY_VERSION='3.4.*' WITH_DOCTRINE_CACHE_BUNDLE='yes' SYMFONY_DEPRECATIONS_HELPER='max[indirect]=4'
-    -
-      php: 7.3
       env: SYMFONY_VERSION='4.4.*' WITH_DOCTRINE_CACHE_BUNDLE='yes' SYMFONY_DEPRECATIONS_HELPER='max[indirect]=4'
     -
-      php: 7.3
+      php: 7.4
+      dist: focal
       env: SYMFONY_VERSION='5.3.*'
     -
-      php: 7.3
+      php: 7.4
+      dist: focal
       env: SYMFONY_VERSION='5.4.*' MIN_STABILITY='dev'
   allow_failures:
     - env: SYMFONY_VERSION='5.4.*' MIN_STABILITY='dev'

Controller/SettingsController.php

@@ -5,14 +5,14 @@
 use Craue\ConfigBundle\CacheAdapter\CacheAdapterInterface;
 use Craue\ConfigBundle\Entity\SettingInterface;
 use Craue\ConfigBundle\Form\ModifySettingsForm;
-use Symfony\Bridge\Doctrine\ManagerRegistry;
+use Doctrine\Common\Persistence\ManagerRegistry;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\Form\FormFactoryInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Session\Session;
 use Symfony\Component\HttpFoundation\Session\SessionInterface;
-use Symfony\Component\Translation\TranslatorInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
 use Twig\Environment;
 
 /**

composer.json

@@ -17,29 +17,29 @@
 	],
 	"require": {
 		"php": "^7.3|^8",
-		"doctrine/doctrine-bundle": "^1.5.1|~2.0",
+		"doctrine/doctrine-bundle": "^1.6.11|~2.0",
 		"psr/simple-cache": "^1.0",
-		"symfony/cache": "~3.4|~4.4|~5.3",
-		"symfony/config": "~3.4|~4.4|~5.3",
-		"symfony/dependency-injection": "~3.4|~4.4|~5.3",
-		"symfony/form": "~3.4|~4.4|~5.3",
-		"symfony/framework-bundle": "~3.4|~4.4|~5.3",
-		"symfony/http-foundation": "~3.4|~4.4|~5.3",
-		"symfony/http-kernel": "~3.4|~4.4|~5.3",
-		"symfony/options-resolver": "~3.4|~4.4|~5.3",
-		"symfony/validator": "~3.4|~4.4|~5.3"
+		"symfony/cache": "~4.4|~5.3",
+		"symfony/config": "~4.4|~5.3",
+		"symfony/dependency-injection": "~4.4|~5.3",
+		"symfony/form": "~4.4|~5.3",
+		"symfony/framework-bundle": "~4.4|~5.3",
+		"symfony/http-foundation": "~4.4|~5.3",
+		"symfony/http-kernel": "~4.4|~5.3",
+		"symfony/options-resolver": "~4.4|~5.3",
+		"symfony/validator": "~4.4|~5.3"
 	},
 	"require-dev": {
 		"craue/translations-tests": "^1.0",
 		"doctrine/instantiator": "^1.0.5",
 		"doctrine/orm": "^2.5.14",
 		"phpunit/phpunit": "^9.5",
-		"symfony/asset": "~3.4|~4.4|~5.3",
-		"symfony/browser-kit": "~3.4|~4.4|~5.3",
+		"symfony/asset": "~4.4|~5.3",
+		"symfony/browser-kit": "~4.4|~5.3",
 		"symfony/flex": "^1.13",
 		"symfony/phpunit-bridge": "~5.3",
-		"symfony/twig-bundle": "~3.4|~4.4|~5.3",
-		"symfony/web-profiler-bundle": "~3.4|~4.4|~5.3"
+		"symfony/twig-bundle": "~4.4|~5.3",
+		"symfony/web-profiler-bundle": "~4.4|~5.3"
 	},
 	"minimum-stability": "stable",
 	"autoload": {
@@ -55,7 +55,7 @@
 			"dev-master": "2.6.x-dev"
 		},
 		"symfony": {
-			"require": "~3.4.23|~4.4|~5.3"
+			"require": "~4.4|~5.3"
 		}
 	},
 	"config": {