Add version history

Author: acoumb

src/Umbraco.Cms.Integrations.DAM.Aprimo/readme.md

@@ -76,4 +76,7 @@ Properties available from the strongly-typed model:
 - Title
 - Thumbnail
 - Crops
-- Asset fields
+- Asset fields
+
+### Version history
+- 1.0.0 - Initial release