Add type & keywords to Collections composer.json

src/Collection/composer.json

@@ -1,6 +1,13 @@
 {
     "name": "cakephp/collection",
     "description": "Work easily with arrays and iterators by having a battery of utility traversal methods",
+    "type": "library",
+    "keywords": [
+        "cakephp",
+        "collections",
+        "iterators",
+        "arrays"
+    ],
     "license": "MIT",
     "authors": [
         {