[3.8.1]

March 2nd, 2021

Switch publish repository to MavenCentral (bintray/jcenter sunset)

Fixes

- Fix app crashing when the rollout length is zero ([#423](https://github.com/optimizely/java-sdk/pull/423)).
- Fix javadoc warnings ([#426](https://github.com/optimizely/java-sdk/pull/426)).


https://github.com/optimizely/java-sdk/releases/tag/3.8.1