At https://mvnrepository.com/artifact/org.springframework.security.experimental/spring-security-oauth2-authorization-server the latest release 0.2.0 is missing.
It stopped there with 0.1.2, why? 0.2.0 is out almost a month ago.
As part of the 0.2.0
release, the Authorization Server moved out of experimental status and into the Spring projects portfolio.
You can find the 0.2.0
version under org.springframework.security:spring-security-oauth2-authorization-server
.