Snippet format update

To match the starter (for the migration)

snippets/objectToPairs.md

@@ -1,4 +1,7 @@
-### objectToPairs
+---
+title: objectToPairs
+tags: object,array,beginner
+---
 
 Creates an array of key-value pair arrays from an object.
 
@@ -10,4 +13,4 @@ const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
 
 ```js
 objectToPairs({ a: 1, b: 2 }); // [ ['a', 1], ['b', 2] ]
-```
+```