Update CHANGES.txt

Author: emmanvg

CHANGES.txt

@@ -1,3 +1,13 @@
+Version 1.2.0.5
+2018-03-06
+- #343 Create separate test environments for when maec is or is not installed
+- #342 to_json fails on parsing datetime
+- #339 [Python3 not supported - v1.1/1.2] to_json vaguely broken on some files
+- #336 Report field ttp has the wrong type information
+- #325 Bug in Indicator class setter for observables property
+- Change stix.ToolInformation to use AttackerToolType vocab
+- Removed Python 2.6 environment from CI tests
+
 Version 1.2.0.4
 2017-05-02
 - Add support for Python 3.6.