[release] 0.24.0 - Fix race condition on background event retry, Inte…

…rnal logging and SDK Key verification (#223)

Bug fix:
- Fix a customer-reported race condition bug, remove an already removed
future

Internal changes:
- Track event count and log log_event request failure to sdk_exception
so we can track the event loss
- More internal logging on SDK metadata, core apis (checkGate,
getExperiment...) call, and always log sdk initialization data
- SDK Key verification -- Ensure initialization data and sdk key matches





>Included In This Release
>- 670b549 Xin Li
>   - Alway log init diag (#221)
>- 8f4f523 kenny-statsig
>   - remove futures if not already removed (#219)
>- 91e2a22 sroyal-statsig
>   - SDK Key Verification (#220)
>- e5672e9 Daniel
>   - Failed events to eb (#215)

statsig/version.py

@@ -1 +1 @@
-__version__ = '0.23.0'
+__version__ = '0.24.0'