v0.0.3 - Patch issues with background event flush, sinceTime, and null target value

• Fixes a crash when conditions were set up in the console with an empty target (e.g. "userID" "any of" (blank))
• Fixes an issue where the background thread was not running to flush events
• Fixes #23

v0.0.2 - Exposes the statsig application to elixir, fixes bug in flush()

Fix flush api (#21)

* Fix flush api

* Add a flush() call as well to test