PSR-4 compliant

Author: Hyunk3l

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "hyunkel/php-design-patterns",
+    "name": "Hyunk3l/php-design-patterns",
     "description": "Just another design patterns collection for PHP",
     "authors": [
         {
@@ -8,12 +8,19 @@
         }
     ],
     "require": {
-        "phpunit/phpunit": "4.4.*",
         "squizlabs/php_codesniffer": "dev-master"
     },
     "autoload": {
         "psr-4": {
-            "PhpDesignPatterns\\": ""
+            "Hyunk3l\\PhpDesignPatterns\\": "src/"
         }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Hyunk3l\\Test\\PhpDesignPatterns\\": "test/"
+        }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^6.0"
     }
-}
+}