* (Minor) Add ability to add request kwargs when initializing the client. These will be used when registering the client, fetching feature flags, and sending metrics.
2.5.0
**General**
* (Minor) Unleash client will not error if cache is not present and Unleash server not accessible during initialization.
2.4.0
**General**
* (Minor) Added static context values (app name, env) in preparation for Unleash v4 features.
2.3.0
**General**
* (Minor) Add option to disable metrics on client initialization.
**Bugfix**
* (Minor) Fixed issue where `disable_metrics` arugment wasn't honored.
2.2.1
**Bugfixes**
* (Major) Date/time sent to Unleash (in register, metrics, etc) is correctly in UTC w/timestamp format.