[composer] Symfony5の対応を行った。

Author: MasaakiYoshida

composer.json

@@ -12,11 +12,11 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/config": "~2.8|~3.0",
-        "symfony/dependency-injection": "~2.8|~3.0",
-        "symfony/http-kernel": "~2.8|~3.0",
-        "symfony/security-bundle": "~2.8|~3.0",
-        "symfony/security-core": "~2.8|~3.0"
+        "symfony/config": "~4.0|~5.0",
+        "symfony/dependency-injection": "~4.0|~5.0",
+        "symfony/http-kernel": "~4.0|~5.0",
+        "symfony/security-bundle": "~4.0|~5.0",
+        "symfony/security-core": "~4.0|~5.0"
     },
     "autoload": {
         "psr-4": {