Bump version to 3.12.0-SNAPSHOT
Bump version to 3.12.0-SNAPSHOT

joel-costigliola/assertj-core,xasx/assertj-core,assertj/assertj-core,assertj/assertj-core,joel-costigliola/assertj-core,xasx/assertj-core,hazendaz/assertj-core,hazendaz/assertj-core