moved some packages to dev requirements (#456)

composer.json

@@ -28,7 +28,6 @@
         "symfony/framework-bundle": "^4.0",
         "symfony/monolog-bundle": "^3.1",
         "symfony/orm-pack": "^1.0",
-        "symfony/profiler-pack": "^1.0",
         "symfony/security-bundle": "^4.0",
         "symfony/security-csrf": "^4.0",
         "symfony/serializer": "^4.0",
@@ -36,7 +35,6 @@
         "symfony/translation": "^4.0",
         "symfony/twig-bundle": "^4.0",
         "symfony/validator": "^4.0",
-        "symfony/webpack-encore-pack": "^1.0",
         "symfony/yaml": "^4.0",
         "twig/extensions": "^1.5",
         "white-october/pagerfanta-bundle": "^1.1"
@@ -53,8 +51,10 @@
         "symfony/debug-pack": "^1.0",
         "symfony/maker-bundle": "^1.0",
         "symfony/phpunit-bridge": "^4.0",
+        "symfony/profiler-pack": "^1.0",
         "symfony/thanks": "^1.0",
-        "symfony/web-server-bundle": "^4.0"
+        "symfony/web-server-bundle": "^4.0",
+        "symfony/webpack-encore-pack": "^1.0"
     },
     "config": {
         "preferred-install": {