bower-asset/swagger-ui to 5 (#35)

Update composer.json
"bower-asset/swagger-ui": "^5.0"

Author: Krakozaber

composer.json

@@ -13,7 +13,7 @@
   "require": {
     "yiisoft/yii2": "^2.0.0",
     "zircote/swagger-php": "^4.0",
-    "bower-asset/swagger-ui": "^4.0"
+    "bower-asset/swagger-ui": "^5.0"
   },
   "minimum-stability": "stable",
   "autoload": {