Added bug fix to change log

Author: kmvanbrunt

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.9.9 (TBD, 2019)
+* Bug Fixes
+    * Fixed bug where the ``set`` command was not tab completing from the current ``settable`` dictionary.
+    
 ## 0.9.8 (February 06, 2019)
 * Bug Fixes
     * Fixed issue with echoing strings in StdSim. Because they were being sent to a binary buffer, line buffering