[release] 0.29.0 - Add Option for Evaluation Callback (#235)

Adds an optional parameter to the statsig options which specifies a
callback to be called whenever a config is checked





>Included In This Release
>- 6b90b08 sroyal-statsig
>   - Add Eval Callback Option (#234)

Co-authored-by: statsig-kong[bot] <sroyal@statsig.com>

statsig/version.py

@@ -1 +1 @@
-__version__ = '0.28.0'
+__version__ = '0.29.0'