Bump gem version

CHANGELOG.md

@@ -1,6 +1,11 @@
+## 0.0.7
+- Rename Item#json to Item#hash for consistency
+- Add offer / listing parsing
+
 ## 0.0.6
 - Handle more date parsing failures. 
 - Get width, height, depth and weight from items
+
 ## 0.0.5
 
 - Merged pull request #3 allowing options to be passed into the get_items and get_variations request