Added changes for 0.2.0

Author: MSeal

docs/changelog.md

@@ -1,4 +1,24 @@
 # Changelog
 
+## 0.2.0
+
+### Major Changes
+
+- Async support is now available on the client. Methods that support async have an `async_` prefix and can be awaited [#10](https://github.com/jupyter/nbclient/pull/10) [#35](https://github.com/jupyter/nbclient/pull/35) [#37](https://github.com/jupyter/nbclient/pull/37) [#38](https://github.com/jupyter/nbclient/pull/38)
+- Dropped support for Python 3.5 due to async compatability issues [#34](https://github.com/jupyter/nbclient/pull/34)
+- Notebook documents now include the [new kernel timing fields](https://github.com/jupyter/nbformat/pull/144) [#32](https://github.com/jupyter/nbclient/pull/32)
+
+### Fixes
+
+- Memory and process leaks from nbclient should now be fixed [#34](https://github.com/jupyter/nbclient/pull/34)
+- Notebook execution exceptions now include error information in addition to the message [#41](https://github.com/jupyter/nbclient/pull/41)
+
+### Docs
+
+- Added [binder examples](https://mybinder.org/v2/gh/jupyter/nbclient/master?filepath=binder%2Frun_nbclient.ipynb) / tests [#7](https://github.com/jupyter/nbclient/pull/7)
+- Added changelog to docs [#22](https://github.com/jupyter/nbclient/pull/22)
+- Doc typo fixes [#27](https://github.com/jupyter/nbclient/pull/27) [#30](https://github.com/jupyter/nbclient/pull/30)
+
 ## 0.1.0
+
 - Initial release -- moved out of nbconvert 6.0.0-a0