Update container version

Author: Riimu

composer.json

@@ -25,7 +25,7 @@
     "psr/http-message": "^1.0",
     "psr/http-factory": "^1.0",
     "simply/router": "^0.2.3",
-    "simply/container": "^0.3.0",
+    "simply/container": "^0.3.1",
     "zendframework/zend-diactoros": "^2.0"
   },
   "require-dev": {