Snippet format update

To match the starter (for the migration)

snippets/isPrimitive.md

@@ -1,4 +1,7 @@
-### isPrimitive
+---
+title: isPrimitive
+tags: type,function,array,string,intermediate
+---
 
 Returns a boolean determining if the passed value is primitive or not.
 
@@ -15,4 +18,4 @@ isPrimitive('Hello!'); // true
 isPrimitive(false); // true
 isPrimitive(Symbol()); // true
 isPrimitive([]); // false
-```
+```