Updated CHANGELOG for v0.39.0 (#661)

* Updated CHANGELOG for v2.38.0

* Update versions in chanelog

* Added changelog for 0.37.0

Author: dliakhov

CHANGELOG

@@ -1,3 +1,17 @@
+Release 0.39.0
+
+- Fixed issue with connection to authenticated MongoDB Arbiter
+- Update dependencies
+
+Release 0.38.0
+
+- Fixed setting auth options for connection to MongoDB
+
+Release 0.37.0
+
+- Disable creating metric mongodb_mongod_storage_engine when it's not possible to retrieve (for example for mongos type of instance)
+- Update dependencies
+
 Release 0.36.0
 
 - Added security metrics with info about encryption