updated readme.md

Author: zookzook

README.md

@@ -19,13 +19,12 @@ to implement the current requirements for the driver.
 ## Motivation
 
   * [ ] Refactoring old code into new
-  * [ ] Understand the magic in the code
   * [x] Simplify code: remove raw_find (raw_find called from cursors, raw_find called with "$cmd"), so raw_find is more calling a command than a find query.
   * [x] Better support for new MongoDB version, for example the ability to use views
   * [x] Upgrade to ([DBConnection 2.x](https://github.com/elixir-ecto/db_connection))
   * [x] Removed depreacated op codes ([See](https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#request-opcodes))
   * [x] Support for SCRAM-SHA-256 (MongoDB 4.x)
-  * [ ] Support for change streaming api ([See](https://github.com/mongodb/specifications/blob/master/source/change-streams/change-streams.rst))
+  * [x] Support for change streaming api ([See](https://github.com/mongodb/specifications/blob/master/source/change-streams/change-streams.rst))
   * [ ] Add `op_msg` support ([See](https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#op-msg))
   * [ ] driver sessions ([See](https://github.com/mongodb/specifications/blob/master/source/sessions/driver-sessions.rst))
   * [ ] driver transactions ([See](https://github.com/mongodb/specifications/blob/master/source/transactions/transactions.rst))