update composer.json

Author: MasaakiYoshida

composer.json

@@ -12,19 +12,19 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/config": "~2.8|~3.0|~4.0",
-        "symfony/dependency-injection": "~2.8|~3.0|~4.0",
-        "symfony/framework-bundle": "~2.8|~3.0|~4.0",
-        "symfony/http-foundation": "~2.8|~3.0|~4.0",
-        "symfony/http-kernel": "~2.8|~3.0|~4.0",
-        "symfony/routing": "~2.8|~3.0|~4.0"
+        "symfony/config": "~4.0|~5.0",
+        "symfony/dependency-injection": "~4.0|~5.0",
+        "symfony/framework-bundle": "~4.0|~5.0",
+        "symfony/http-foundation": "~4.0|~5.0",
+        "symfony/http-kernel": "~4.0|~5.0",
+        "symfony/routing": "~4.0|~5.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.0",
-        "symfony/asset": "~2.8|~3.0|~4.0",
-        "symfony/browser-kit": "~2.8|~3.0|~4.0",
-        "symfony/filesystem": "~2.8|~3.0|~4.0",
-        "symfony/http-foundation": "~2.8|~3.0|~4.0"
+        "symfony/asset": "~4.0|~5.0",
+        "symfony/browser-kit": "~4.0|~5.0",
+        "symfony/filesystem": "~4.0|~5.0",
+        "symfony/http-foundation": "~4.0|~5.0"
     },
     "autoload": {
         "psr-4": {