Snippet format update

To match the starter (for the migration)

snippets/defaults.md

@@ -1,4 +1,7 @@
-### defaults
+---
+title: defaults
+tags: object,intermediate
+---
 
 Assigns default values for all properties in an object that are `undefined`.
 
@@ -10,4 +13,4 @@ const defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj
 
 ```js
 defaults({ a: 1 }, { b: 2 }, { b: 6 }, { a: 3 }); // { a: 1, b: 2 }
-```
+```