Add changelog and bump version

Author: joelostblom

CHANGELOG.md

@@ -5,6 +5,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 Version number is based on [Semver](https://semver.org/).
 Note that major version zero (0.y.z) is for initial development and anything may change at any time.
 
+## [0.2.1] - 2021-05-30
+
+## Fixed
+- Raise useful message upon unauthorized course access
+
 ## [0.2.0] - 2021-05-30
 
 ## Added

canvascli/__init__.py

@@ -1 +1 @@
-__version__ = "0.2.0"
+__version__ = "0.2.1"