Merge pull request #1084 from planetlabs/steve/2.13.0-changelog

update changelog for v2.13.0

Author: stephenhillier

CHANGES.txt

@@ -1,3 +1,12 @@
+2.13.0 (2024-12-18)
+- Add Planet class (`from planet import Planet`)
+  - Planet is a client that uses sync methods. Users do not have 
+    to interact with asyncio to use the sync client.
+  - the Planet class is implemented by calling out to the async methods.
+    This should be transparent to users. Depending on uptake and feedback,
+    the underlying implementation may change in the future (but we will commit
+    to semantic versioning when it comes to breaking changes in the API).
+
 2.12.0 (2024-12-09)
 - Add parameters to the subscriptions list command: --source-type, --created, --start-time,
   --end-time, --updated, --hosting, --name, --name-contains, and --sort-by.
@@ -455,4 +464,4 @@ package is coming soon. The highlights are
 
 0.0.1 (2015-07-17)
 ------------------
-- Initial release
+- Initial release