update release notes

change_logs/release_0.4.2.md

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+<img src="../assets/k9s_small.png" align="right" width="200" height="auto"/>
+
+# Release v0.4.2
+
+## Notes
+
+Thank you to all that contributed with flushing out issues with K9s! I'll try
+to mark some of these issues as fixed. But if you don't mind grab the latest
+rev and see if we're happier with some of the fixes!
+
+If you've filed an issue please help me verify and close.
+
+Thank you so much for your support and awesome suggestions to make K9s better!!
+
+Also if you dig this tool, please make some noise on social! [@kitesurfer](https://twitter.com/kitesurfer)
+
+---
+
+## Change Logs
+
+### o Decode Secrets On Demand
+
+  Secrets can now be base64 decoded to view their actual content.
+
+  In the secret view you can use `ctrl-x` to decode a selected secret. [Feature #123](https://github.com/derailed/k9s/issues/123)
+
+### o YAML Highlighter
+
+  Describe and YAML commands will now yield syntax highlighted views.
+  [Feature #142](https://github.com/derailed/k9s/issues/142)
+
+---
+
+## Resolved Bugs
+
++ Sort by age busted [Issue #145](https://github.com/derailed/k9s/issues/145)
++ Logs not escaped correctly [Issue #137](https://github.com/derailed/k9s/issues/137)
+
+---
+
+<img src="../assets/imhotep_logo.png" width="32" height="auto"/> © 2019 Imhotep Software LLC. All materials licensed under [Apache v2.0](http://www.apache.org/licenses/LICENSE-2.0)