Incorporating #4 (Fix PSR-4 autoloading)

Author: sirn-se

composer.json

@@ -14,12 +14,12 @@
     ],
     "autoload": {
         "psr-4": {
-            "": "src/"
+            "Phrity\\Util\\": "src/"
         }
     },
     "autoload-dev": {
         "psr-4": {
-            "": "tests/"
+            "Phrity\\Util\\Tests\\": "tests/"
         }
     },
     "require": {