Merge pull request #10 from open-contracting/changelog

Author: jpmckinney

README.md

@@ -17,3 +17,10 @@ Depending on the nature of the documents, publishers should consider duplicating
 ## Issues
 
 Report issues for this extension in the [ocds-extensions repository](https://github.com/open-contracting/ocds-extensions/issues), putting the extension's name in the issue's title.
+
+## Changelog
+
+### v1.1.3
+
+* Use Apache 2.0 License
+* Add tests and tidy code