Add autoload setup and require phpunit

composer.json

@@ -1,5 +1,18 @@
 {
     "name": "loomlabs/utility.collection",
+    "autoload": {
+        "psr-4": {
+            "LoomLabs\\Utility\\Collection\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "LoomLabs\\Utility\\Collection\\Tests\\": "tests/"
+        }
+    },
     "version": "1.0.0",
-    "license": "MIT"
+    "license": "MIT",
-}
+    "require-dev": {
+        "phpunit/phpunit": "^12.1"
+    }
+}