v0.3.0 - adding support for private user attributes
We are adding support for private user attributes with this release. privateAttributes
can be set on StatsigUser and any info set in it will only be used for evaluation/targeting purposes, and removed from any logs sent to Statsig server. See more info at https://docs.statsig.com/server/golangSDK#private-attributes
Also fixed a bug where shutdown
API did not flush events synchronously.