* Prunes all non-core components
Remove modules:
- spring-pulsar-spring-boot-starter
- spring-pulsar-reactive-spring-boot-starter
- spring-pulsar-spring-boot-autoconfigure
- spring-pulsar-spring-cloud-stream-binder
- Remove config props plugins
- Update docs to point to Spring Boot config props
- Move intTest into spring-pulsar and spring-pulsar-reactive
* Replace refs from `spring-projects-experimental` to `spring-projects`
* Update spring-pulsar-spring-boot-starter to 0.2.1-SNAPSHOT