[Composer] Update dependencies

composer.json

@@ -20,11 +20,11 @@
     ],
     "require": {
         "php": "^7.3",
-        "knplabs/knp-snappy-bundle": "^1.5",
+        "knplabs/knp-snappy-bundle": "^1.7",
         "myclabs/php-enum": "^1.7",
         "sylius/resource-bundle": "^1.6",
-        "sylius/sylius": "~1.8.0",
-        "symfony/messenger": "^4.3"
+        "sylius/sylius": "^1.8",
+        "symfony/messenger": "^4.4"
     },
     "require-dev": {
         "behat/behat": "^3.4",
@@ -41,19 +41,14 @@
         "phpspec/phpspec": "^6.0",
         "phpstan/phpstan": "0.12.29",
         "phpstan/phpstan-webmozart-assert": "0.12.6",
-        "phpunit/phpunit": "^6.5",
-        "sylius-labs/coding-standard": "^2.0",
-        "symfony/browser-kit": "^4.3",
-        "symfony/debug-bundle": "^4.3",
-        "symfony/dotenv": "^4.2",
-        "symfony/framework-bundle": "^4.3",
-        "symfony/intl": "^4.3",
-        "symfony/web-profiler-bundle": "^4.3",
-        "symfony/web-server-bundle": "^4.3"
-    },
-    "conflict": {
-        "symfony/doctrine-bridge": "4.3.0",
-        "symfony/framework-bundle": "4.3.0"
+        "phpunit/phpunit": "^8.5",
+        "sylius-labs/coding-standard": "^3.2",
+        "symfony/browser-kit": "^4.4",
+        "symfony/debug-bundle": "^4.4",
+        "symfony/dotenv": "^4.4",
+        "symfony/intl": "^4.4",
+        "symfony/web-profiler-bundle": "^4.4",
+        "symfony/web-server-bundle": "^4.4"
     },
     "autoload": {
         "psr-4": {